Tin-lead hot air leveling for Rigid flex PCB
Application occasions: The current application is limited to products exempted from the RoHS directive and military products.
Cost: Medium.
Compatibility with lead-free: not compatible, but can be used for surface treatment of communication products single board.
Storage period: 12 months.
Solderability (wettability): high.
.jpg)
Disadvantages:
* Not suitable for devices with pin center distance <0.5mm, because bridging is prone to occur.
* Not suitable for places with high coplanarity requirements, such as BGAs with medium and high pin counts. Because the thickness of the plating layer of the HASL process varies greatly, the coplanarity of the pad and the pad is poor.
* Due to the relatively large thickness of the plating layer, the hole diameter (DHS) must be compensated to obtain the desired finished metalized hole diameter (FHS), typically FHS=DHS-4~6mil.
Supplier resources: Medium, but with the decrease of customers using leaded processes, Rigid flex PCB are gradually reducing HASL production lines, and resources will become less and less.
Other news about S&L
- Material Considerations for Rigid-Flex PCB Design
- Rigid flex PCB：Difference between Rigid PCB and Flex PCB?
- Rigid flex PCB：Difference between Rigid PCB and Flex PCB?
- Health care PCB – HOW DOES IT IMPACT THE HEALTHCARE SYSTEM?
- WHAT IS METAL CORE PCB (MCPCB) ?
- Preparing Your Design for High Frequency PCB Layout
- FPC supplier：What Is A Touch Screen FPC?
- FPC manufacturer：What is FPC (Flexible Printed Circuit)?
- Flexible PCB supplier china：What is a PCB?
- PCB factory china Challenges—Improve Your Switched-mode Power Supply Designs
Your browsing history
- Flex rigid PCB failure analysis steps
- PCB manufacturer China tells you the Impedance problem handling
- PCB manufacturer China：What is Interfacial Stress in PCBs
- Lamination machine
- FPC manufacturer：What is PCB Bow and Twist?
- PCB factory china：The Difference Between Standard and HDI PCBs
- What are Flex rigid PCB Gold Fingers？
- Flex rigid PCB tells you What are the requirements for PCBA transport packaging
- Metal core PCB deffects found through inspection
- Cost Benefits to Rigid-Flex PCB
A total of -comments【I want to comment】