Stable Process Membrane Switch Overlay Low Resistance Extremely Waterproof
Membrane switch is an operating system that integrates button functions, indicating elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer and lower circuit. When the membrane switch is pressed, the contacts of the upper circuit are deformed downwards and are in contact with the plates of the lower circuit. After the finger is released, the contacts of the upper circuit bounce back, the circuit is disconnected, and the circuit triggers a signal. Membrane switch has rigorous structure, beautiful appearance and good sealing performance. It has the characteristics of moisture resistance and long service life. Widely used in electronic communication, electronic measuring instruments, industrial control, medical equipment, automobile industry, smart toys, household appliances and other fields.
PET Membrane Switch Overlay Description:
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.
Process Capability
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
PET Membrane Switch Overlay Applications:
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
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