Best Technology Flex circuit board 210280-2/ -3 Orion Flex Heater

Best Technology Flex circuit board 210280-2/ -3 Orion Flex Heater

**Box of New PCB flexible circuit boards. Flex CB Bran new in bags. Everything in pictures are included. See photos for further details.

Dome switches are a very popular solution for use as a momentary switch. They are a good solution that provides tactile feedback that the switch has been depressed and an event registered. Many applications require a dome switch mounted to a flexible circuit board. These range from large user interface applications with many multiple dome switches to simple 1-3 switches for a space-constrained location in a handheld device. A flex circuit design, or in some extremely complex rigid-flex circuit board designs, allows the complete integration of the design. Any additional connectors or cabling between a rigid PCB and the dome switch area is eliminated thus saving space/weight and additional assembly costs. 

Surface finish requirements will depend upon the application and whether the design also contains components that require soldering. The application considerations are the degree of reliability required for the application, the number of cycles the dome switches will experience during the life of the product, and if the electronics are sensitive to the contact resistance of the actuated dome switch.

The three standard finish options are:

• Nickel Plating: 50-200 uIN for <1 million cycles and 200 -500 uIN for > 1 million cycles with no contact resistance requirements. Please note this surface finish does not meet the requirements of ZIF connectors and does not allow for component soldering. This surface finish is seldomly used.
• Hard Gold: 15-30 uIN for <1 million cycles and 30 -50 uIN for > 1 million cycles with low contact resistance requirements. Both thickness ranges meet ZIF connector requirements. However, if component soldering is required then 15uIN hard gold is recommended to prevent the formation of brittle solder joints.
• ENIG (Electroless Nickel Immersion Gold): 100-200 uIN Nickel + 3-5 uIN gold. Low cycle life requirements. Meets most ZIF connector requirements. Allows for all component soldering. Not used in high-reliability applications. Additional testing may be required to ensure the finished part meets the number of cycles required.