The API-type of keypad is an assembly of a silicone rubber membrane with plastic buttons. The plastic buttons may have printings, laser etching or metallization up to custom requirements. Additional frames can be applied to create a full assembly unit.
Similar to the the other types of keypads, electrical conductive contact element can be added to create a switch function when pushing onto a contact pattern on the PCB or FPC. Various contact elements are available to meet specific electronic switching requirements.

API-type design examples
 Automotive RKE unit
 Metallized key separator
 Automotive steeringwheel unit
 Automotive RKE unit
 PCD metallized buttons 
 Metal dome switches and
 ultrasonic welded back panel 

Every item or numerical value indicated herein is measured by Shin-Etsu and out of guarantee.
Characteristics and graphs are for reference only. Actual resistances and forces are up to the design of substrates and assembly constructions. 
More information can be found in the design guides.
The quality of the assembled products is out of guarantee.
Please make sure to review the purpose and conditions of use and practice you own tests.
Industrial ownership like patent doesn't guarantee the usage of products.