06180048 is referenced by 27 patents and cites 5 patents.

A manufacturing method of a keypad for a contact character illumination rubber switch composed of a surface enriched in color design variations is provided. The method includes forming a black or gray intermediate layer (

3

) on a surface portion of a color keypad member (

1

) for a contact character illumination switch of the mobile communication system, electric equipment components for cars or the like. A colored surface layer (

4

) is formed thereon with any color. A laser beam is applied from the upper side thereof for burning up and removing the intermediate layer and the colored surface layer.

Title
Manufacturing method of color keypad for a contact of character illumination rubber switch
Application Number
9/325907
Publication Number
6180048 (B2)
Application Date
June 4, 1999
Publication Date
January 30, 2001
Inventor
Masaya Katori
Tokyo
US
Agent
McGlew and Tuttle P C
US
Assignee
Polymatech
US
IPC
B29C 35/08
View Original Source