1、yageo
2、ta-i technology co,ltd
3，koa
4，vishay
5，ralec electronics corp
6，walsin technology corporation
7，fenghua advanced technology
8，samsung electro-mechanics
9、panasonic
10，uni ohm
11、rohm co,ltd
12，tateyama kagaku industry co,ltd
13、elektronische bauelemente gmbh(ebg)
14、ever ohms technology co,ltd