FB-Type   HG-Type / DCP(carbon printing)

Several options are available. Inner-type: The Shin-Etsu Rubber-Contact futures high actuation force, high stroke and good click feeling. HG-type: HG-Type characteristics back-lit key tops and soft feeling. The HG-Type Rubber Contact lights up only the letter that is illuminated, via a light-transmissitive material. The HG-type was developed and marketed by Shin-Etsu Polymer, and is the first of its kind in the world. FB-type: FB-type characteristics hard feeling in spite of plastic knobs and back lit function. Also film can be printed various colors and graphics on back side of film.

Sectional View:

Type Designation Material  FB  a.Film Film(PC)  b.Printed layer Ink  c.Plastic area Polycarbonate resin  d.area Adhesion  e.Rubber contact Conductive silicone ink  f.Printed circuit board -  g.Contact (board side) -

	Type Designation Material  HG  a.Key top (translucent) Sillicone rubber  b.Light-shielding latyer Sillicone rubber  c.Character area Sillicone rubber  d.Color-translucent layer   (character area) Sillicone ink  e.Contact (RC side) Conductive sillicone ink  f.Housing -  g.Printed circuit board -  h.Contact (board side) -  i.Light-guiding plate -  j.LED -
It is available to design dom and contact in RC.

Functions of Shin-Etsu Rubber-Contact:

Function/type Inner-type  Contact Carbon Contact Conductive rubber Conductive print Metal Contact Gold plating  Dome Non-click Click Over-stroke click PET dome  Key top printing Key top suface printing *1 Back side printing  Key top Coating *2 Standard coat (OC) Semi-hard coat (SH) Hard coat(HH)  Metallic tone Key top printing Semi-hard coat (SH)  Lighting Key top lighting Highlight graphics  Light storage Key top light storage  Antibacterial   Material of specific gravity (White color only) :Mass production is possible. :Prototype production is possible. :Under study. :Under study. *1:The Rubber-Contact cannot be manufactured for some key top profiles and under other conditions. *2:Only the uppermost surface of the key top can be processed. However, the total surface can be processed for semi-hard (SH) products.

Resistance Test Results Versus Oil, Chemicals and Environment Factors:

Test Item Test condition Inner-type  Environmental test  High-temperature and  high-humidity test 60, 95%RH, 240H  Temperature cycle test -20~70, 40cycles  High-temperature test 90, 240H  Low-temperature test -40, 240H<  Weather resistance test* Sunshine weather menter, 150 continuous hours  Oil and  chemical resistance test  Alcohol Soaked in ethanol, 12 hours  Artificial fingerprint liquid Soaked in artificial fingerprint liquid, 12 hours  Hard cream Placed in a high-temperature and high-humidty tester for 240 hours with left materials applied to the key top surface.  Olive oil  Glass cleaner  Rubbing test  Methanol 100 abrasion cycles with cotton canvas moistenced with left materials prwithsed onto the key top surface with a force of 500g.  Ethanol  Toluene Swelling  Johnson Wax  Regular gasoline Swelling  Engine oil  Kerosene *Yellowing color difference data (based on Hunter's color difference method, in pursuance of JIS K7103) KTP-type: Standard product: gE=7.7, Improved product: gE=2.9, PB-N-type: gE=2.7 :Accepted *Circuit for acceptance There shall ce no cracks, breaks, peeling or other visible defects. There shall be no changes in color tone or other abnormalities. *The figures above show the changes in the characteristics under specific testing conditions, and therefore the figures are not guaranteed under actual operating conditions. Please note that the judgement will differ depending on the product specifications, and testing conditions.