The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1996
Filed:
Jul. 11, 1995
Applicant:
Inventors:
Bradley J Larsen, Woodland Park, CO (US);
Kurt Schertenleib, Colorado Springs, CO (US);
Assignee:
Atmel Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257774 ; 257690 ; 257773 ; 257775 ;
Abstract
A contact of large dimensions having a stringer strongly adhered to a contact hole's sidewalls. The contact hole is made to have a patterned perimeter having grooves protruding outward. The grooves have a size equal to a minimum contact dimension in at least one direction so as to ensure good step coverage into the groove areas. The grooves serve to anchor the stringer to the contact hole sidewalls by increasing the sidewall's surface area which increases adhesion, distributing stress from the stringer to the groove areas, and providing grooves with good step coverage.