Reball a loose BGA only when its identity, provenance, package condition, moisture and thermal history, present and target solder alloy, manufacturer restrictions, and downstream qualification path are known. Replace it when a traceable replacement carries less technical and qualification risk. Hold it for engineering use when important evidence is missing, and reject it when identity, package integrity, or permitted reuse cannot be established.
A complete-looking new ball array proves only the physical attributes that were actually inspected. It does not prove semiconductor function, remaining life, downstream solder-joint reliability, or final product qualification.
This guide helps three owners make one documented disposition decision:
- Designer or component engineer: confirm package data, ball map, alloy compatibility, manufacturer restrictions, and the downstream assembly path.
- Quality or NPI: define incoming evidence, inspection coverage, acceptance source, traceability, exceptions, and the qualification still required.
- Procurement: compare replacement and recovery using the same provenance, evidence, schedule, packaging, and qualification assumptions.
Is component reballing the same as board-level BGA rework?
No. Component reballing concerns the solder-ball array on a loose device. Board-level BGA rework concerns a package installed on a PCB or PCBA, including removal, site condition, reinstallation, board-specific thermal control, concealed-joint inspection, and board release.
| Incoming object | Decision owned here | Use another owner for |
|---|---|---|
| Loose BGA with damaged, removed, or incompatible solder balls | Reball, replace, hold for engineering use, or reject the component | Final device and product qualification |
| Loose LGA or QFN | Determine whether the exact package supports a supplier-specific termination-restoration route; do not assume a BGA ball process applies | Package-specific method and acceptance rules |
| Assembled PCB/PCBA with a BGA issue | Route to the BGA rework and low-void reflow checklist | Board removal, land/site repair, reinstallation, board profiling, and PCBA release |
A component removed from a board can pass through both workflows, but the evidence cannot be merged. Physical acceptance of the loose component does not release the repaired board, and board-level inspection does not establish the component's remaining life.
BGA disposition matrix: reball, replace, hold, or reject
Use the matrix as a gate, not as an automatic authorization. The customer-named specification, exact component manufacturer documentation, application risk, and approved qualification plan control the final decision.
| Input condition | Main risk | Evidence required before release | Disposition action |
|---|---|---|---|
| Exact manufacturer and MPN are confirmed; source, lot/date code, chain of custody, package condition, storage and prior thermal exposure are documented; ball damage is isolated; manufacturer restrictions and downstream qualification path are understood | Reballing can still add thermal, handling, alloy, and qualification burden | Package drawing and ball map; material/alloy declaration; incoming condition record; exposure history; customer-approved acceptance and qualification plan | Reball candidate. Obtain written feasibility and evidence scope from a candidate service provider before authorizing work |
| A traceable replacement is available and avoids uncertain history, special setup, or a disproportionate evidence and qualification burden | Recovery may cost more time or create more uncertainty than replacement | Replacement provenance, authorized-source status, lot/date code, schedule, storage condition, and required incoming evidence | Replace. Keep the comparison based on total evidence and qualification burden, not unit price alone |
| Identity is plausible but provenance, storage, moisture exposure, prior reflow/removal/bake history, present alloy, or manufacturer permission is incomplete | Hidden history may invalidate the proposed process or reuse decision | Missing source records; manufacturer guidance; package/alloy data; engineering risk review; segregated inventory record | Hold for engineering use. Do not release into production inventory until the missing evidence and approval are closed |
| Present-to-target alloy conversion is requested but package materials, termination compatibility, downstream paste/profile, customer restrictions, or qualification ownership are not defined | Metallurgical and downstream assembly incompatibility | Manufacturer material declaration; current and target alloy; downstream assembly materials and process limits; customer-approved validation plan | Hold. Treat alloy conversion as a new compatibility decision, not a purchasing note |
| Balls are damaged but the package body, substrate, pads/lands, marking, or incoming cleanliness condition also shows unexplained damage | A new ball array may conceal rather than resolve component damage | Documented incoming images/records; disposition by the component or product authority; any additional examination named by that authority | Reject or engineering hold. Do not infer recoverability from ball damage alone |
| Marking conflicts with records, lot/date code cannot be reconciled, chain of custody is unacceptable, or counterfeit concern remains unresolved | Wrong, altered, or unqualified devices may enter the build | Approved provenance and authentication route; resolved nonconformance; product-authority approval | Reject. Reballing cannot repair an identity or authenticity failure |
| Physical ball-array evidence is acceptable, but electrical function, application behavior, or product qualification has not been completed | Physical acceptance may be mistaken for functional release | Separate electrical/functional plan, representative assembly evidence, and product/system qualification owned by the customer | Hold for engineering use until the next validation gate is passed |
The economic comparison should include component availability and value, quantity and lot segmentation, setup or tooling, inspection and report scope, destructive samples where required, return packaging, schedule risk, and downstream qualification. No generic savings or recovery rate can decide that tradeoff for a specific device.
What must be known before a component becomes a reball candidate?
Identity, provenance, and package definition
Record the manufacturer, exact MPN, quantity, source, purchase and chain-of-custody evidence, lot/date code, marking, and current packaging state. Attach the current manufacturer package drawing and ball map. The drawing should control package outline, terminal pattern, pitch, ball or termination definition, and any device-specific restrictions; a generic BGA table is not a substitute.
For brokered, salvaged, obsolete, or customer-supplied inventory, define who accepts provenance risk and what authentication evidence is required. If the identity or lot cannot be reconciled, stop the disposition workflow before discussing reballing.
Moisture, storage, and prior thermal exposure
Document the component's moisture sensitivity classification, sealed or opened packaging state, storage environment, floor-life record when applicable, and every known reflow, removal, reball, bake, or other thermal exposure. Use the component manufacturer's current handling instructions and the customer-named standard and revision. Do not invent a bake or exposure rule when the history or applicable document is unknown.
Unknown exposure is not a minor paperwork gap. It changes whether another thermal process can be evaluated and whether the component may be considered for production, engineering-only use, or rejection.
Present alloy, target alloy, and downstream compatibility
State the present solder alloy and the requested target alloy from controlled component data or verified evidence. Then review the component termination, land pattern, paste/alloy system, intended assembly process, customer material restrictions, and product qualification plan together.
An alloy change is not complete when the visible array looks uniform. The customer or product authority must decide whether the converted component is compatible with the downstream assembly and what evidence is needed before reuse. If a contract line will place the reballed parts, share this record with the SMT assembly team so paste and reflow settings match the new alloy.
Incoming damage and manufacturer restrictions
Separate ball damage from damage to the package body, substrate, terminal pads/lands, marking, or other incoming features. Record what is visible, what is unknown, and what condition caused the component to enter review. Check the manufacturer documentation for handling, rework, reuse, alloy, moisture, and thermal restrictions that apply to the exact device.
If the manufacturer prohibits the proposed route, required data is unavailable, or non-ball damage cannot be dispositioned, reballing should not be treated as the default recovery action.
Which evidence should a candidate service provider define?
Ask each candidate provider to return a comparable evidence scope for the exact component and lot. A method name alone is not an acceptance plan.
| Evidence layer | What to request | Evidence owner and limitation |
|---|---|---|
| Incoming condition | Quantity reconciliation, identity/marking record, packaging state, photographs or agreed condition record, damage and exception log | Customer supplies provenance and history; provider records only the incoming checks included in its quotation |
| Feasibility and route | Exact package/termination/alloy boundary, proposed process route, setup assumptions, exclusions, lot segregation, handling controls, and change approval | Candidate provider owns only the contracted route after written acceptance; availability must be confirmed in the quotation |
| Physical ball-array acceptance | Named attributes, method, coverage or sample plan, acceptance source/revision, results format, and nonconformance handling | Provider supplies only quoted evidence; physical acceptance does not prove function or lifetime |
| Optional composition or destructive evidence | Why the evidence is needed, method, sample quantity, acceptance limits, specimen disposition, and report fields | Customer/product authority defines need and limits; candidate provider states whether it is available |
| Electrical or functional evidence | Test object, fixture, firmware, conditions, limits, coverage, result format, and owner | Customer defines device behavior and supplies required test assets unless a quotation explicitly assigns them elsewhere |
| Traceability and exceptions | Incoming lot/date code, process lot identity, route/revision, deviations, rework or repeat exposure, NCR and approval linkage | Scope must be written into the quotation; generic supplier quality language is insufficient |
| Return packaging | Required tray, tape-and-reel, moisture-barrier or other packaging; labeling; lot segregation; shipping condition; included records | Buyer specifies the return condition; provider confirms only what the quotation includes |
| Final product qualification | Representative assembly, reliability, environmental, regulatory, and system-level evidence required for release | Customer or product/system authority owns final qualification; a reballing provider cannot replace this decision |
Inspection methods such as visual measurement, automated optical inspection, X-ray, alloy identification, coplanarity measurement, shear testing, electrical test, or functional test may answer different questions. Request only the methods justified by the risk and exact acceptance plan, and require the candidate provider to state whether each is available, included, sampled, destructive, or excluded. This list is a supplier-evaluation checklist, not a statement of HilPCB capability.
Supplier evidence and RFQ checklist
Submit the component disposition package
- Manufacturer, exact MPN, package name, quantity, and lot/date code.
- Source, provenance, purchase and chain-of-custody records, plus intended application and risk level.
- Current manufacturer package drawing, ball map, material declaration, moisture/reflow data, and known restrictions.
- Present alloy and target alloy, including why a conversion is requested.
- Current packaging and storage state, moisture/floor-life history when applicable, and prior reflow, removal, reball, bake, or other thermal exposure.
- Incoming condition record and clear images of ball, package, substrate, terminal, marking, or contamination concerns.
- Downstream land pattern, paste/alloy, assembly route, customer material restrictions, and qualification plan relevant to compatibility.
- Required document and revision, inspection/test attributes, coverage or sampling, acceptance limits, report format, and record retention.
- Required traceability, lot segregation, exception/change control, nonconformance route, and target schedule.
- Requested return packaging, labeling, tray or tape format, moisture protection, and shipping condition.
Require the quotation to state
- Whether the exact component, condition, alloy objective, quantity, and schedule are feasible.
- What work is included and excluded, who performs it, and who owns process control and nonconformance decisions.
- Which incoming, process, physical inspection, composition, destructive, electrical, or functional records are included or optional.
- Which methods are 100% or sampled, destructive or non-destructive, and which customer specification/revision and limits control acceptance.
- What marking, traceability, lot separation, exception record, and return packaging will be delivered.
- What customer-supplied fixtures, firmware, golden units, specifications, approvals, or additional qualification remain prerequisites.
Do not accept phrases such as “inspected,” “tested,” “to standard,” or “as original” without the method, scope, acceptance basis, owner, and report deliverable. Supplier process evidence can support a disposition; it cannot transfer final product qualification away from the customer.
Who owns release after physical reballing acceptance?
Responsibility stays layered:
- Candidate service provider: owns only the process, handling, inspection, records, and exceptions explicitly included in the accepted quotation.
- Customer/component authority: owns device identity, permitted reuse, manufacturer restrictions, acceptance criteria, downstream compatibility, and electrical or functional release.
- Product/system authority: owns representative assembly, reliability, environmental, regulatory, and final product qualification.
The same separation applies when a component was removed from an assembly and will be installed again. Use the board-level BGA rework and low-void reflow checklist for the PCBA evidence chain; do not use a loose-component inspection record as a board release record.
Frequently asked questions
When should a loose BGA be reballed instead of replaced?
Treat it as a reball candidate only when identity, provenance, package condition, storage and thermal history, present and target alloy, manufacturer restrictions, downstream compatibility, and qualification ownership are known. Compare its full evidence and qualification burden with a traceable replacement.
Is BGA reballing the same as BGA rework on a PCB?
No. Reballing changes the solder-ball array on a loose component. Board-level rework removes, repairs, replaces, or reinstalls a package on a PCB and requires a separate board process and release evidence chain.
Does visual, AOI, or X-ray inspection prove a reballed component works?
No. Those methods can document only the physical attributes covered by the specified inspection. They do not by themselves prove semiconductor function, remaining life, downstream solder-joint reliability, or final product qualification.
Can a component with unknown provenance or thermal history be released after reballing?
Not on the strength of reballing alone. Missing identity, source, storage, moisture, or prior exposure evidence should trigger an engineering hold or rejection until the product authority closes the risk with an approved evidence and qualification plan.
What should a component reballing RFQ include?
Include the exact MPN, package drawing and ball map, quantity and lot/date code, provenance, present and target alloy, MSL/storage and prior thermal history, incoming damage, manufacturer restrictions, downstream compatibility, required inspection/test evidence, traceability, and return packaging.
Can physically accepted components go directly into production?
Not automatically. Physical ball-array acceptance is one evidence layer. The customer still owns electrical or functional release, representative assembly validation, application requirements, and final product qualification.
Submit a Component Disposition Package for Feasibility Review
Use the full Submit a Component Disposition Package for Feasibility Review form. Put the component and evidence checklist in the special-requirements field and attach the package drawing, ball map, provenance, condition, exposure, alloy, acceptance, and return-packaging records available for review.
Submission does not confirm that stand-alone reballing or alloy conversion is available. The returned quotation, if any, must confirm feasibility, process availability, inclusions, exclusions, evidence deliverables, packaging, schedule, and responsibilities for the exact component and lot.