PCB factory china:Double-Sided & Multi-Layer Flex PCBs
Hard gold is a gold alloy with complexes of cobalt, nickel or iron in PCB factory china. A low-stress nickel is used between gold over-plating and copper. Hard gold is not suitable for wire bonding.
We recommend using the hard gold surface finish for components and applications with heavy usage and a high likelihood of wear and tear, like:
- Edge Connector Fingers
- Interconnected Carrier Boards
- Keypads
- Contacts
The thickness of the hard gold surface finish will vary depending on the applications. When hard gold is used for compliance in military applications, the minimum thickness shall be 50 -100 micro inch.
Nonmilitary applications require 25 to 50 micro inches. Here are the recommended minimum and maximum thickness values:
- 17.8 μin is recommended for IPC maximum solderable thickness
- 25 μin gold over 100 μin nickel for IPC Class 1 & Class 2 applications
- 50 μin gold over 100 μin nickel for IPC Class 3 applications
Other news about S&L
- Sun&Lynn Circuits CO., Ltd. was invited to attend the Sixth Global Customs AEO Conference!
- Celebrating the Establishment of SUNLYNN CIRCUITS(THAILAND)
- Good News! Sun&Lynn Circuits Co.,Ltd. is honored as one of the Top 100 Innovative Enterprises in Bao
- What Should You Know about Metal Core PCB
- FPC supplier : the types of Flexible PCB
- PCB manufacturer China:Why PCB board snake line, what is it used for?
- What is Metal Core PCB and types of Metal Core PCB?
- Why are High frequency PCBs much more expensive than normal PCBs?
- Flexible PCB supplier China :When to use flexible PCB?
- Flexible PCB manufacturer:What Is Flex Soldering?
Your browsing history
- FPC supplier:Can the QR code be used up?
- What is an Inverter PCB
- What are the applications of Automotuve PCB for automotive industry
- What is the circuit board silk screen in PCB supplier china
- FPC manufacturer How To Specify PCB Thickness
- Flexible PCB supplier China :Honor denies establishment of Indian subsidiary
- DJN awarded S&L for the Best Quality Performance of PCB supplier
- PCB factory china tells you what is Printed Circuit Board Prototype
- Flexible PCB manufacturer Surface Coating Functions
- What are the important parameters of high frequency PCB
A total of -comments【I want to comment】