Granted Patent
Utility
US 6,774,640 · App. 10/224,151
Test coupon pattern design to control multilayer saw singulated plastic ball grid array substrate mis-registration
Inventor:
Jian-Jun Li
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Aug 20, 2002
Inventor
Jian-Jun Li
Assignee (at issue)
ST Assembly Test Services Pte Ltd
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.