John R MacDonald
Burglar Alarm in Orem, UT
License number
Utah 7019484-6502
Issued Date
Aug 11, 2008
Expiration Date
Mar 31, 2015
Category
Burglar Alarm
Type
Burglar Alarm Company Agent
Address
Address
Orem, UT
Professional information
Postponed Rom Programming
US Patent:
4397887, Aug 9, 1983
Filed:
Aug 18, 1982
Appl. No.:
6/409010
Inventors:
Haluk M. Aytac - Berkeley CA
John F. MacDonald - Orem UT
John F. MacDonald - Orem UT
Assignee:
National Semiconductor Corporation - Santa Clara CA
International Classification:
B05D 512, H01L 744, B44C 122, C03C 1500
US Classification:
427 85
Abstract:
A process to program ROM's after the insulation, gates, and interconnect circuitry have been formed by using a contact mask to define openings at the depletion cells, which openings extend beside the gates to the sources and drain so as to allow phosphorus dopant to be diffused sideways under the gates to short out the cell.