Electronic Flexible Circuit Keypad Control Panel Membrane Switch
(1) Features:
Overlay material: Polyester (PET)of AUTOTYPE or Polycarbonate(PC) of LEXAN
Rear adhesive: 3M 467MP, 3M 468MP, 3M9471LE etc
Matching color: Pantone and RAL color matching system
Tail, pin and circuit layout: According to the requirement of customers
Metal dome or poly dome
(2) Electrical features
Maximum circuit rating: 50 V DC, 100mA, 500MW
Contact resistance: 0.5-10Ω (varied from the trace length and material used.
Insulation resistance ≥ >= 100MΩ At 100V
Dielectric withstand: 250VRms (50 to 60 Hz/min. )
Contract bounce ≤ <=10 ms
(3) Mechanical features
Actuation force: Flat type=57 to 284G (2 to 10oz), tactile type=170 to 397 g(6 to 14 oz)
Switch stroke: Flat type=0.1 to 0.5mm, tactile type=0.6 to 1.5mm
(4) Environmental features
Operation temperature: Flat/metal dome: -20 to 80, poly dome: -20 to 55
Storage temperature: Flat/metal dome: -40 to 80, poly dome: -40 to 60
Operation humidity 90% (40)for 240 hrs
Vibration 20GS max (10 to 200Hz, MIL-STD-202, M204, condition B)
1, Structure: a flexible plate (R) and rigid plate (Y)
1), R structure: membrane switch panel layer, isolation layer, circuit layer of all the various different types of soft films, such as: PET, PC, PVC composition.
2), Y structure: switch the graphics and lines are made in the ordinary double-sided printed circuit copper complex on both sides, through the metal holes will line both sides of communication, and welding in the back of the device, with a metal guide plate as guide through the maze touch the contact plate, then rub with pieces of wire wound into a flat cable.
3, membrane switch using a film sheet
Panel timber: British Ketu Tai and international cooperation with Third AUTO TEX products, the thickness of different specifications, there are (thickness 0.12 ~ 0.25UM) panel timber.
PET with sand surface: F series (fine sand surface), V series (coarse sand surface). Have to play convex, two special chemical treatment after the polarity of good sheet, sand surface may be printed on a transparent window, liquid, smooth can be printed PVC, PC type ink.
Hard coating chemical treatment of the PET: EBG (smooth) family of EBA (Matte) series
PC hard coating film have different specifications: AUTOFLEXPC G (Glossy) AUTOFLEXPC A (Matte)
Circuit layer with a sheet: a: AUTOTEX product specific PET.
The thermal stability and anti-shrink treatment and adhesion treated PET sheet of smooth, there AUTOSTAT CT3, CT4, CT5, CT7, thickness, respectively 25,100,125 UM.
The thermal stability and anti-shrink treatment and adhesion treated PET sheet mist for HT5, thickness 125UM.
The thermal stability and anti-shrink treatment and adhesion treatment opaque white satin-like PET sheet for WT5, thickness 125UM.
Isolation layer is usually 0.05 ~ 0.2MM thick PET, PVC, its thickness depends on the key spaces and isolated fenestrae size and form. Fenestrae is made of separate stamping.
4, printed materials and print
Window solution: UV curing. There WINDOTEX GLOSS (smooth transparent), WINDOTEX ANTIGIARE (matte surface) that is matte, FOTOTEX UV MATT (sand surface). Glossy and matte liquid transparent window window solution can be mixed to achieve the desired effect. Pre-press and complete mixing, 100T mesh, 25 # 35 # capillary film production network version, avoiding sun printing, printing printing order placed on the surface of the first or second process. Liquid layout window allows the window to restore hair all things transparent, but also allows the window to become opaque and transparent matte surface.
Screen Printing glue optional Section III and the international Lai brand C/Tacr110, the glue applied to -40 ~ 180 ºC, for material for the PET, PC, PS, PP, PMMA and metal, glass.
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