Quality Control

1. Material and ink inspection 

Supplier provides inspection report, incoming material inspection record, ink temperature and humidity control.

2. Exposure workshop

Temperature and humidity control, work and related personnel need to wear static clothing, as well as record production control diary.

3. Developing & Etching

Control of developer, etchant, chemicals. Concentration specific gravity, addition of record parameters and control of time within the required range.

4. AOI inner layer line inspection

Personnel certification, first sample record, differentiation of good and defective products.

5. Lamination

Lamination with fool-proofing design.

6. Drilling

Drill head scrap control and grinding records, broken pin inspection and handling procedures, first sample inspection records, whether there are hole deviations.

7. Plating

Plating solution preparation, time, strength of electric，control, test records.

8. Film lamination

Storage conditions, FIFO and shelf life, control methods

9. Hole plugging/Coating/Texting

Stencil alignment, ink viscosity specific gravity control, stencil management. Personnel picking and placing of boards.

10. HASL LF/OSP

Temperature, pressure, immersion time, availability of X-Ray measurement of tin thickness, film thickness control, rework process.

11. Outline

First part record, V-Cut inspection, parameter setting, depth, spacing, outline dimensions

12. Electrical testing/quality inspection

Test board differentiation/marking, personnel certification, repair actions, inspection actions.

13、Packaging

The boards are vacuum packed in accordance with regulations, with the humidity indicator cards, material number, quantity and customer requirements.

14、Quality control of outgoing factory

A: Quality control capability of the outgoing factory. B: Records of outgoing projects. C: Key acceptance items.