Granted Patent
Utility
US 5,525,540 · App. 08/355,213
Method for manufacturing silicon layer having impurity diffusion preventing layer
Inventors:
Masanobu Zenke, Fumiki Aisou
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Dec 9, 1994
Inventors
Masanobu Zenke
Fumiki Aisou
Assignee (at issue)
NEC CORPORATION
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.