BGA rework and reballing require a project-specific assessment. Package construction, solder alloy, board condition and previous thermal exposure influence whether repair is practical. A quoted package size or a generic temperature profile does not establish that a particular assembly can be repaired reliably.
Rework, reballing and replacement are different operations
Rework addresses a component or assembly that does not meet its requirements. Reballing replaces the solder balls on a removed BGA package; it does not repair a defective semiconductor die. Replacing the device may be more appropriate when the component is electrically damaged, its history is uncertain or reuse is not permitted by the product requirements.
Information to provide before requesting a quote
| Project information | Why it matters |
|---|---|
| Full manufacturer part number and package drawing | Identifies dimensions, pitch, ball layout and device-specific handling limits. |
| PCB photographs and relevant assembly documentation | Helps assess access, nearby parts, board support and visible damage. |
| Known solder alloy and assembly history | Supports review of material compatibility and previous heat exposure. |
| Fault symptoms and diagnostic results | Helps distinguish a suspected interconnect fault from a failed device or another circuit problem. |
| Quantity, required tests and acceptance criteria | Defines the work scope, records and release decision. |
Thermal profiling must match the assembly
The process needs controlled heating and measured temperatures at relevant locations. Board thickness, copper distribution, package construction and nearby heat-sensitive parts can change the thermal response. Moisture history and any baking requirements must also be reviewed against the applicable component and board guidance.
Circuit Technology Center's BGA profile-development guide describes thermocouple-based development and separate removal and replacement profiles. Its numerical examples refer to tin-lead solder; they should not be copied unchanged into a lead-free process. This is an external technical reference, not a statement of Informic's equipment or certifications.
Agree on inspection and testing before work starts
The acceptance plan should identify what will be inspected, what will be electrically tested and what constitutes a pass or fail. For hidden BGA joints, discuss suitable inspection methods with the service provider. An inspection image alone does not demonstrate that every device function operates correctly.
- Record the incoming condition and component identification.
- Check the reworked area for visible pad, solder-mask or board damage.
- Specify inspection coverage and the criteria used to evaluate the results.
- Define electrical or functional tests relevant to the assembly.
- Keep traceable records of the work, materials and disposition.
Questions to ask a rework provider
- Is the exact device, pitch and board construction supported?
- Is the work performed internally or by a qualified partner?
- Which documents support the claimed capabilities and certifications?
- How are thermal profiles qualified for this assembly?
- What happens if incoming inspection finds damage that makes repair unsuitable?
- Which inspection results and test records are included in the quote?
Frequently asked questions
Does reballing guarantee that a failed BGA will work?
No. The root cause must be diagnosed, and the device and board must remain suitable for reuse. Agree on the test plan and acceptance criteria before authorizing work.
Can one turnaround time apply to every project?
No. Assessment, materials, process development and the required testing affect the schedule. Request a written project-specific scope and delivery estimate.
How can I discuss a project with Informic?
Contact Informic with the part number, quantity, fault description and required testing. Confirm service availability, the performing facility and applicable quality requirements before shipping an assembly or placing an order.
