FAQ:

Q1. How many types of surface finish YDY can do?
We has the full series of surface finish, such as: ENIG, OSP, LF-HASL, gold plating (soft/hard), immersion silver, Tin, silver plating, immersion tin plating, carbon ink and etc. ..

OSP, ENIG, OSP + ENIG commonly used on the HDI, we usually recommend that you use a client or OSP OSP + ENIG if BGA PAD size less than 0.3 mm.

Q2. What kind of PCB file format can you accept for production?
Gerber, PROTEL 99SE, PROTEL DXP, CAM350, ODB+(.TGZ)

Q3. How do we ensure quality?
Our high quality standard is achieved with the following.
1. The process is strictly controlled under ISO 9001:2008 standards.
2. Extensive use of software in managing the production process
3. State-of-art testing equipments and tools. E.g. Flying Probe, X-ray Inspection, AOI (Automated Optical Inspector) and ICT (in-circuit testing).
4. Dedicated quality assurance team with failure case analysis process
5. Continuous staff training and education

Q4. How can we guarantee you receive an good quality product?

For PCB, we will use Flying Probe Test, E-test etc. for it.
For PCBA, we need you to offer us a method or test fixture for the function test.Before that, our inspectors will use microscope and X-ray to check the IC footwelding or bad solder etc.

Q5. What’s the key equipments for HDI manufacturing?
Key equipment list is as following: Laser drilling machine, Pressing machine, VCP line, Automatic Exposing machine, LDI and etc.

Q6. What’s the typical process flow for multi-layer PCB?
Material cutting → Inner dry film → inner etching → Inner AOI → Multi-bond→ Layer stack up Pressing → Drilling → PTH → Panel Plating → Outer Dry Film → Pattern Plating → Outer etching → Outer AOI → Solder Mask → Component Mark → Surface finish → Routing → E/T → Visual Inspection.