Metal Dome Membrane Switch/Tactile Membrane Switch/Waterproof Tactile Switch
Membrane switch, also known as light touch keyboard, is made of PC, PVC, PET, FPC and double-sided adhesive and other soft materials, using screen printing technology produced by the multi-plane combination seal set graphics, keys, symbols display, electrical conductivity and electronic switch functions in one of the plastic electronic products. The main characteristics of the film switch are: 1, small and light: the weight of the general film switch is a few grams to dozens of grams, very easy to carry and disassembly.
The main technical indicators
1. Max size: single sided, double sided:600mm * 500mm Multi-layer: 400mm * 600mm
2. Processing thickness:0.2mm -4.0mm
3. Copper foil substrate thickness: 18μ(1/ 2OZ ),35μ( 1OZ ),70μ( 2OZ )
4. Common material: FR-4 , CEM-3 , CEM-1, Polytetrachloroethylene,FR-1(94V0,94HB)
5. Light copper,Nickel-plated,Gilded,HAL；Immersion Gold,Antioxidant,HASL,Immersion Tin,etc.
1. The mobile phone
Focuses on the flexible circuit board light weight and thin thickness. Can effectively save the volume of products, easy connection of the battery, microphone, and buttons and into one.
2. Computer and LCD screen
Use the one line configuration of flexible circuit boards, and thin thickness. The digital signal into the picture, through the LCD screen
3. CD player
Focuses on three dimensional assembly characteristics of flexible circuit boards and thin thickness. The huge CD to carry around
4. Disk drives
Regardless of the hard disk, or diskette, is very dependent on FPC high softness and thickness of the 0.1 mm slim, read data finish quickly. Either a PC or NOTEBOOK.
5. The latest applications
Hard disk drives (HDDS, hard disk drive) of suspended circuit (Su ensi. N cireuit) and the components of xe packaging board, etc
I nsulation Material
I nsulation layer thichness
1. Drilling:The minimum diameter 0.1mm
2. Hole metallization:Minimum aperture 0.2mm,Thickness / aperture ratio 4:1
3. Wire width: Minimum:Gold plate 0.10mm, Tin plate0.1mm
4. Wire spacing: Minimum:Gold plate 0.10mm, Tin plate0.1mm
5. Gold plate: nickel layer thickness:≧2.5μ,Gold layer thickness: 0.05-0.1μm or according to customer requirements
6. HASL: tin layer thickness:≧2.5-5μ
7. Paneling: Line-to-edge minimum distance: 0.15mm hole to edge minimum distance: 0.15mm smallest form tolerance: ± 0.1mm
8. Socket chamfer: Angle: 30 degrees, 45 degrees, 60 degrees Depth: 1-3mm
9. V Cut: Angle: 30 degrees, 35 degrees, 45 degrees Depth: thickness 2/3 Minimum size: 80mm * 80mm