[{"data":1,"prerenderedAt":66},["ShallowReactive",2],{"blog-pcb-isolation-milling-vs-etching-en":3},{"title":4,"description":5,"date":6,"lastUpdated":6,"category":7,"image":8,"imageAlt":9,"readingTime":10,"wordCount":11,"timeRequired":12,"htmlContent":13,"faq":14,"tags":30,"slug":34,"sourceLocale":35,"availableLocales":36,"jsonld":42},"PCB Isolation Milling vs. Etching for Prototypes","Compare isolation milling, wet etching and outsourced PCB prototypes by construction, inspection evidence, accepted-board cost and verification goals.","2026-11-12","manufacturing","/assets/blogs/pcb-isolation-milling-vs-etching/hand-etched-copper-board.webp","Hand-etched circuit board with exposed copper traces and pads",12,2353,"PT12M","\u003Cp>Consider \u003Cstrong>isolation milling\u003C/strong> for an early circuit check when the entire available process can produce the required copper geometry and the finished board can be inspected against the requirements. Consider \u003Cstrong>wet etching\u003C/strong> when the resist and etching process can produce the required finished pattern and you can verify it. Consider \u003Cstrong>production-intent outsourcing\u003C/strong> when the decision depends on the intended stackup, plated interconnects, finish, assembly or manufacturing controls.\u003C/p>\n\u003Cp>The deciding factor is not the method’s reputation. It is the evidence needed for the next engineering decision, the construction required to obtain it, and the processes and inspection tools actually available.\u003C/p>\n\u003Cdiv data-component=\"BlogQuickQuoteInline\">\u003C/div>\n\n\u003Ch2>Start with the verification goal\u003C/h2>\n\u003Cp>Write down what the board must prove before selecting a fabrication route.\u003C/p>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Verification goal\u003C/th>\n\u003Cth>Construction and evidence to consider\u003C/th>\n\u003Cth>Starting choice\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\u003Ctr>\n\u003Ctd>Check a low-frequency circuit concept\u003C/td>\n\u003Ctd>Accessible nets, suitable copper geometry, continuity and functional measurements\u003C/td>\n\u003Ctd>Milling or etching, if the layout fits the process\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Check fine features or assembly access\u003C/td>\n\u003Ctd>Finished feature and hole measurements, intended components and assembly method\u003C/td>\n\u003Ctd>Compare demonstrated local capability with an outsourced build\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Evaluate controlled impedance or multilayer behavior\u003C/td>\n\u003Ctd>Intended material, stackup, copper construction, geometry and relevant measurements\u003C/td>\n\u003Ctd>Production-intent outsourcing is often the better starting point\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Evaluate environmental or service reliability\u003C/td>\n\u003Ctd>Representative construction plus applicable exposure and reliability tests\u003C/td>\n\u003Ctd>Specify the construction and tests first; a bare prototype alone is insufficient\u003C/td>\n\u003C/tr>\n\u003C/tbody>\u003C/table>\n\u003Cp>These are starting points, not guarantees. An outsourced board can be unrepresentative if the order substitutes materials or omits required controls. A locally made board can be useful for a narrower question even when it differs substantially from the intended product.\u003C/p>\n\u003Cp>Use the \u003Ca href=\"/en/blog/pcb-prototyping/\">PCB prototyping guide\u003C/a> for broader planning, and the \u003Ca href=\"/en/blog/pcb-prototype-readiness-checklist/\">prototype readiness checklist\u003C/a> to identify missing design and verification inputs.\u003C/p>\n\u003Cp>When impedance is part of the decision, the \u003Ca href=\"/en/blog/controlled-impedance-pcb-design-review/\">controlled impedance design review\u003C/a> covers stackup, reference planes and validation planning.\u003C/p>\n\u003Ch2>What isolation milling actually removes\u003C/h2>\n\u003Cp>Isolation milling uses a rotating cutter to remove narrow paths of copper around conductors. The remaining copper forms the traces and pads. It is different from:\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Profile routing:\u003C/strong> cutting the board outline or internal cutouts.\u003C/li>\n\u003Cli>\u003Cstrong>Depth milling:\u003C/strong> removing material to a controlled depth, such as for a recess.\u003C/li>\n\u003C/ul>\n\u003Cp>One machine may perform several operations, but each needs its own tooling, setup and verification. A successful isolation pass does not establish that the outline, holes or recesses meet their requirements.\u003C/p>\n\u003Ch3>Cutter shape, reach and local depth\u003C/h3>\n\u003Cp>A small cutter must fit the required isolation gap, but its tip diameter alone is not enough to decide that it will. Consider the cutter’s full geometry, including the included angle of a V-shaped tool, shaft diameter and clearance around adjacent features. A wider cut can remove adjacent copper even when the tool tip fits the nominal gap.\u003C/p>\n\u003Cp>For an ideal V-shaped cutter with a flat tip, a useful planning approximation is:\u003C/p>\n\u003Cp>\u003Cstrong>Cut width at the copper surface ≈ tip width + 2 × depth × tan(half the included angle)\u003C/strong>\u003C/p>\n\u003Cp>Here, depth is measured from the copper surface to the tip, and the approximation applies only while the surface intersects the cutter's conical section. Actual results also depend on runout, deflection, wear and the board surface; the equation is not a machine-accuracy specification or a guarantee of finished dimensions. It shows why a small depth change can alter the isolation width: a deeper cut can remove more copper than intended.\u003C/p>\n\u003Cp>Check every critical gap and pad, including spaces near connectors and component footprints. A thin trace may remain electrically continuous yet have less width than the design calls for. A narrow pad may survive fabrication but offer insufficient margin for assembly or rework.\u003C/p>\n\u003Ch3>Flatness, securing and wear\u003C/h3>\n\u003Cp>The tool must penetrate the copper along the entire isolation path without unnecessarily cutting deep into the substrate. Board bow, a tilted spoilboard, debris under the blank or uneven securing can make the local depth vary. A flat, clean support and a fixture that holds the work without obstructing the tool are important. Surface probing or height mapping may help where available, but still requires verification of the setup and resulting cut.\u003C/p>\n\u003Cp>Tool wear can widen or roughen cuts, leave burrs, tear copper or fail to clear an isolation channel. Track tool use and inspect representative features, especially after a tool change. Re-establishing the tool reference and confirming the new cut are separate from loading the replacement.\u003C/p>\n\u003Cp>Milling also creates dust and small debris. Trained personnel should use the machine, guarding, extraction and personal protection required by local procedures. Do not treat a visible copper gap as the only acceptance check.\u003C/p>\n\u003Ch2>What controls a wet-etched pattern\u003C/h2>\n\u003Cp>Etching removes exposed copper through a controlled chemical process; a resist protects the copper intended to remain. The pattern therefore depends on both the resist image and what happens to the copper beneath and beside it.\u003C/p>\n\u003Cp>\u003Cimg src=\"/assets/blogs/pcb-isolation-milling-vs-etching/hand-etched-copper-board.webp\" alt=\"Hand-etched circuit board with exposed copper traces and pads\">\u003C/p>\n\u003Cp>\u003Cem>A hand-etched board after the protective layer has been removed. The photograph illustrates an etched copper pattern, not a measured result or a HILPCB production board.\u003C/em>\u003C/p>\n\u003Cp>Before choosing this route, assess:\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Starting copper:\u003C/strong> thickness and condition influence how much copper must be removed and the geometry that remains. The specified starting copper is not necessarily the final trace thickness.\u003C/li>\n\u003Cli>\u003Cstrong>Resist integrity:\u003C/strong> cleanliness, adhesion, coverage and registration matter. Pinholes, damaged edges or poor adhesion can expose intended conductors. Protect any copper surfaces that are not meant to be etched.\u003C/li>\n\u003Cli>\u003Cstrong>Chemistry and agitation:\u003C/strong> chemistry condition, copper loading, temperature control and agitation can affect uniformity. Use the approved process controls and inspection methods for the facility.\u003C/li>\n\u003Cli>\u003Cstrong>End point:\u003C/strong> stopping before unwanted copper is cleared can leave shorts; continuing beyond the needed point can remove additional material. Establish how completion will be checked under the local procedure.\u003C/li>\n\u003Cli>\u003Cstrong>Lateral etch:\u003C/strong> removal also progresses sideways beneath resist edges. The final trace can be narrower, and its cross-section different, from the original image. Starting copper and process conditions affect this behavior.\u003C/li>\n\u003C/ul>\n\u003Cp>Inspect the finished copper rather than accepting the artwork or resist image as proof of the final dimensions. Tight gaps, small pads and long fine traces deserve particular attention. Where the required dimensions leave little margin for lateral etch or resist defects, obtain evidence from the actual process or consider an appropriately specified outsourced build.\u003C/p>\n\u003Cp>For more context on how etched trace geometry affects high-frequency designs, see \u003Ca href=\"/en/blog/etching-precision-hf-pcb/\">etching precision for HF PCBs\u003C/a>.\u003C/p>\n\u003Cp>Chemical handling, storage, ventilation, spill response and waste management belong to trained personnel following applicable local procedures and regulations. This comparison is not an operating recipe.\u003C/p>\n\u003Ch2>Plan the rest of the board separately\u003C/h2>\n\u003Cp>Neither copper-pattern method automatically provides a finished, assembled PCB. Equally, neither makes the following steps inherently impossible. Define who performs and verifies each one:\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Holes and interconnects:\u003C/strong> drilling or punching is separate from copper patterning. Plated through-holes and vias need a suitable plating process and inspection; an unplated hole does not connect layers by itself.\u003C/li>\n\u003Cli>\u003Cstrong>Layer alignment:\u003C/strong> multilayer or double-sided work needs registration of patterns and holes, followed by checks appropriate to the design.\u003C/li>\n\u003Cli>\u003Cstrong>Solder mask and surface finish:\u003C/strong> specify them when needed, including coverage, openings and compatibility with assembly. Bare copper is not automatically equivalent to the intended finished board.\u003C/li>\n\u003Cli>\u003Cstrong>Assembly:\u003C/strong> decide how components will be placed, soldered, inspected and reworked. Small pads or exposed copper can affect the chosen assembly process.\u003C/li>\n\u003Cli>\u003Cstrong>Testing:\u003C/strong> plan bare-board electrical checks, dimensional inspection, assembly inspection and functional or other tests according to the decision being made.\u003C/li>\n\u003C/ul>\n\u003Cp>For outsourcing, include these requirements in the order rather than assuming they are standard. Ask which construction details, inspection records and test results the supplier can provide, and review substitutions before fabrication. The \u003Ca href=\"/en/quote/\">quote request\u003C/a> is a place to submit the intended construction and requirements for review.\u003C/p>\n\u003Cp>For the fabrication package, the \u003Ca href=\"/en/blog/gerber-data-preparation-pcb-manufacturing-quality/\">Gerber data preparation guide\u003C/a> covers layer identification, drill data and the information that must accompany the artwork.\u003C/p>\n\u003Ch2>Compare cost per accepted usable board\u003C/h2>\n\u003Cp>A quoted price or machine run time alone is not a complete comparison. Count preparation, setup, patterning, holes and profiling, cleanup, inspection, failures, consumables and waste. Include equipment and facility costs in a consistent way. Also compare \u003Cstrong>elapsed time\u003C/strong> with \u003Cstrong>hands-on labor\u003C/strong>: an engineer may be free during a wait, but the board is still unavailable.\u003C/p>\n\u003Cp>The following is an explicitly hypothetical planning example, not a measurement, price list or capability claim.\u003C/p>\n\u003Ch3>Common scope and assumptions\u003C/h3>\n\u003Cp>An approved design calls for six \u003Cstrong>unassembled, single-sided bare-copper boards\u003C/strong>, each with non-plated mounting holes and a routed outline. No plated interconnects, solder mask or surface finish are required for this limited evaluation. All three routes use the same drawing and acceptance plan: inspect specified copper features, holes and outline; check accessible nets for continuity and unintended connections; and reject any board that fails those checks. This plan does not qualify assembly, impedance or reliability.\u003C/p>\n\u003Cp>Assume:\u003C/p>\n\u003Cul>\n\u003Cli>Labor is \u003Cstrong>$50 per hour\u003C/strong>, including shared facility and inspection-tool overhead.\u003C/li>\n\u003Cli>Six candidate boards are processed and inspected in every route; no replacements or rework are purchased.\u003C/li>\n\u003Cli>Rejected boards, their consumed materials and their handling remain in the total.\u003C/li>\n\u003Cli>Dedicated process-equipment allocations include operating costs. Local consumables and disposal are charged separately. The outsourced fabrication charge includes the supplier’s process costs and waste handling.\u003C/li>\n\u003Cli>Design creation, assembly, taxes and financing are outside this defined bare-board comparison. Add them if they differ between real options.\u003C/li>\n\u003C/ul>\n\u003Ch3>Illustrative arithmetic\u003C/h3>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Cost item\u003C/th>\n\u003Cth align=\"right\">Isolation milling\u003C/th>\n\u003Cth align=\"right\">Wet etching\u003C/th>\n\u003Cth align=\"right\">Outsourced fabrication\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\u003Ctr>\n\u003Ctd>Labor\u003C/td>\n\u003Ctd align=\"right\">4 h × $50 = $200\u003C/td>\n\u003Ctd align=\"right\">4.5 h × $50 = $225\u003C/td>\n\u003Ctd align=\"right\">1.75 h × $50 = $87.50\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Six copper blanks\u003C/td>\n\u003Ctd align=\"right\">6 × $3 = $18\u003C/td>\n\u003Ctd align=\"right\">6 × $3 = $18\u003C/td>\n\u003Ctd align=\"right\">Included in fabrication\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Fabrication and shipping\u003C/td>\n\u003Ctd align=\"right\">—\u003C/td>\n\u003Ctd align=\"right\">—\u003C/td>\n\u003Ctd align=\"right\">$120 setup + 6 × $12 + $20 shipping = $212\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Cutters and drill wear\u003C/td>\n\u003Ctd align=\"right\">$18\u003C/td>\n\u003Ctd align=\"right\">$7\u003C/td>\n\u003Ctd align=\"right\">Included\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Resist supplies\u003C/td>\n\u003Ctd align=\"right\">—\u003C/td>\n\u003Ctd align=\"right\">$10\u003C/td>\n\u003Ctd align=\"right\">Included\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Chemistry\u003C/td>\n\u003Ctd align=\"right\">—\u003C/td>\n\u003Ctd align=\"right\">$22\u003C/td>\n\u003Ctd align=\"right\">Included\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Dedicated equipment\u003C/td>\n\u003Ctd align=\"right\">3 h × $8 = $24\u003C/td>\n\u003Ctd align=\"right\">3 h × $4 = $12\u003C/td>\n\u003Ctd align=\"right\">Included\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Other cleanup or inspection supplies\u003C/td>\n\u003Ctd align=\"right\">$2\u003C/td>\n\u003Ctd align=\"right\">$3\u003C/td>\n\u003Ctd align=\"right\">$3\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Waste and scrap handling\u003C/td>\n\u003Ctd align=\"right\">$4\u003C/td>\n\u003Ctd align=\"right\">$8\u003C/td>\n\u003Ctd align=\"right\">$2\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>\u003Cstrong>Total\u003C/strong>\u003C/td>\n\u003Ctd align=\"right\">\u003Cstrong>$266\u003C/strong>\u003C/td>\n\u003Ctd align=\"right\">\u003Cstrong>$305\u003C/strong>\u003C/td>\n\u003Ctd align=\"right\">\u003Cstrong>$304.50\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003C/tbody>\u003C/table>\n\u003Cp>For milling, the assumed four labor hours comprise setup, cutting and drilling, cleanup, and inspection. For etching, the 4.5 hours cover image preparation, processing, drilling and profiling, cleanup, and inspection. The outsourced labor comprises ordering, receiving and scrap handling, plus inspection of all six boards.\u003C/p>\n\u003Cp>Now assume, solely for this example, that four milled, five etched and five outsourced boards pass:\u003C/p>\n\u003Cul>\n\u003Cli>Milling: \u003Cstrong>$266 ÷ 4 = $66.50\u003C/strong> per accepted board.\u003C/li>\n\u003Cli>Etching: \u003Cstrong>$305 ÷ 5 = $61.00\u003C/strong> per accepted board.\u003C/li>\n\u003Cli>Outsourcing: \u003Cstrong>$304.50 ÷ 5 = $60.90\u003C/strong> per accepted board.\u003C/li>\n\u003C/ul>\n\u003Cp>For scheduling, assume milling takes five elapsed hours including one hour of unattended waiting; etching takes six elapsed hours including 1.5 hours of waiting; and outsourcing takes four business days including shipment and receiving. These are planning inputs, not predicted turnaround times.\u003C/p>\n\u003Cp>The apparent ranking changes if acceptance, local labor, equipment availability, disposal charges or shipping change. If the project requires six accepted boards, this example is also incomplete: it does not include the cost or delay of obtaining the missing units.\u003C/p>\n\u003Ch2>Match evidence to the claim\u003C/h2>\n\u003Cp>A continuity check establishes that tested points are electrically connected under the test conditions. A shorts check addresses unintended connections covered by that test. Neither establishes trace width, copper thickness, characteristic impedance, solder-joint quality or long-term performance.\u003C/p>\n\u003Cp>Use evidence appropriate to the requirement:\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Dimensional:\u003C/strong> inspect critical finished copper, holes, board outline and registration with suitable methods and measurement uncertainty.\u003C/li>\n\u003Cli>\u003Cstrong>Electrical and impedance:\u003C/strong> define the measurement, relevant frequency and acceptable result; preserve the construction needed for it to be meaningful.\u003C/li>\n\u003Cli>\u003Cstrong>Environmental and reliability:\u003C/strong> specify representative materials, finishes, interconnects and assembly, then conduct the applicable exposure and reliability tests.\u003C/li>\n\u003Cli>\u003Cstrong>Manufacturing:\u003C/strong> compare the built stackup and process records with the intended production requirements, including any approved deviations.\u003C/li>\n\u003C/ul>\n\u003Cp>A \u003Ca href=\"/en/blog/pcb-inspection/\">PCB inspection plan\u003C/a> can help separate bare-board checks from assembly inspection and functional testing. Where representative test structures are needed, the \u003Ca href=\"/en/blog/pcb-test-coupons/\">PCB test coupon guide\u003C/a> explains how to match coupon construction and reporting to the verification objective.\u003C/p>\n\u003Cp>A prototype is representative \u003Cstrong>only for the requirements its construction and tests support\u003C/strong>. A milled or etched board may answer a circuit question without answering a manufacturing question; an outsourced board may still need additional inspection or testing before it answers either.\u003C/p>\n\u003C!-- faq:start -->\n\n\u003Ch3>Can isolation milling make plated through-holes?\u003C/h3>\n\u003Cp>Isolation milling patterns surface copper; it does not itself plate holes. Plated interconnects require a separate suitable process and verification. If they are important to the decision, specify them explicitly or use a supplier that can provide the required construction.\u003C/p>\n\u003Ch3>How do I choose a cutter for narrow gaps?\u003C/h3>\n\u003Cp>Check the finished gap requirement against the cutter’s complete geometry, reach, depth sensitivity and condition—not just its nominal tip size. Then inspect representative cuts on the actual setup. Board flatness and securing can change the result across the panel.\u003C/p>\n\u003Ch3>Does an etched trace match the resist artwork?\u003C/h3>\n\u003Cp>Not necessarily. Resist defects, starting copper and lateral etch can change the finished feature. Inspect the copper after processing against the drawing, especially where small width or spacing changes matter.\u003C/p>\n\u003Ch3>Is a continuity test enough to release an assembled prototype?\u003C/h3>\n\u003Cp>No. It can support specific net-connectivity claims, but assembly release may also require dimensional checks, inspection of solder joints and components, functional testing, and other tests relevant to the design.\u003C/p>\n\u003Ch3>When should I request a production-intent build?\u003C/h3>\n\u003Cp>Request one when the next decision depends on the intended materials, layer construction, interconnects, finish or assembly process. Provide those requirements and the needed inspection or test evidence; the label alone does not make a build representative.\u003C/p>\n\u003C!-- faq:end -->\n\u003Csection class=\"related-links\" aria-label=\"Related\">\u003Ch3>Related links\u003C/h3>\u003Cul>\u003Cli>\u003Ca href=\"/en/blog/pcb-prototyping/\">PCB Prototyping Services: Fast PCB Prototype Manufacturing & Quick Turn Boards\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/blog/pcb-prototype-readiness-checklist/\">PCB Prototype Readiness Checklist Before Quote and First-Build Release\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/blog/controlled-impedance-pcb-design-review/\">Controlled Impedance PCB Design Review Before Fabrication Release\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/blog/etching-precision-hf-pcb/\">Etching Precision for HF PCB: Achieving Accurate Trace Geometry\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/quote/\">quote request\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/blog/gerber-data-preparation-pcb-manufacturing-quality/\">Gerber Data Preparation for Reliable PCB Fabrication\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/en/blog/pcb-inspection/\">PCB Inspection Services: AOI, X-Ray, and Quality Control Solutions\u003C/a>\u003C/li>\u003C/ul>\u003C/section>",[15,18,21,24,27],{"question":16,"answer":17,"answerText":17},"Can isolation milling make plated through-holes?","Isolation milling patterns surface copper; it does not itself plate holes. Plated interconnects require a separate suitable process and verification. If they are important to the decision, specify them explicitly or use a supplier that can provide the required construction.",{"question":19,"answer":20,"answerText":20},"How do I choose a cutter for narrow gaps?","Check the finished gap requirement against the cutter’s complete geometry, reach, depth sensitivity and condition—not just its nominal tip size. Then inspect representative cuts on the actual setup. Board flatness and securing can change the result across the panel.",{"question":22,"answer":23,"answerText":23},"Does an etched trace match the resist artwork?","Not necessarily. Resist defects, starting copper and lateral etch can change the finished feature. Inspect the copper after processing against the drawing, especially where small width or spacing changes matter.",{"question":25,"answer":26,"answerText":26},"Is a continuity test enough to release an assembled prototype?","No. It can support specific net-connectivity claims, but assembly release may also require dimensional checks, inspection of solder joints and components, functional testing, and other tests relevant to the design.",{"question":28,"answer":29,"answerText":29},"When should I request a production-intent build?","Request one when the next decision depends on the intended materials, layer construction, interconnects, finish or assembly process. Provide those requirements and the needed inspection or test evidence; the label alone does not make a build representative.",[31,32,33],"PCB prototyping","PCB milling","PCB etching","pcb-isolation-milling-vs-etching","en",[35,37,38,39,40,41],"de","it","cn","fr","ru",{"blog":43,"breadcrumb":52},{"@context":44,"@type":45,"headline":4,"description":5,"image":8,"url":46,"datePublished":6,"dateModified":6,"timeRequired":12,"keywords":47,"articleSection":7,"author":48,"publisher":51},"https://schema.org","BlogPosting","https://hilpcb.com/en/blog/pcb-isolation-milling-vs-etching/","PCB prototyping, PCB milling, PCB etching",{"@type":49,"name":50},"Organization","HILPCB",{"@type":49,"name":50},{"@context":44,"@type":53,"itemListElement":54},"BreadcrumbList",[55,60,64],{"@type":56,"position":57,"name":58,"item":59},"ListItem",1,"Home","https://hilpcb.com/",{"@type":56,"position":61,"name":62,"item":63},2,"Blog","https://hilpcb.com/en/blog/",{"@type":56,"position":65,"name":34,"item":46},3,1794758598157]