国家/地区
IPC部 H（2）
IPC大类
IPC小类
IPC
发明人 CHANG K（2）
公开年 2018（2）
申请年 2017（2） 
专利权人 BGT MATERIAL.（2）

LED lamp bulb has LED chips which are electrically connected to conductive portion at both ends of substrate, and phosphor that is attached on light emitting side of LED chips.

LAI Z, ZHANG G, LAI C, CHANG K

Manufacturing method for polymer printed circuit board (PCB), involves forming circuit pattern of porous laser induced graphene (LIG) on polymer material layer, and depositing metal nanoparticles on LIG.

CHANG K, CHEN J, KE W, ZHANG J, LAI C