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:
Oct. 04, 1983
Filed:
May. 13, 1981
Junji Sakurai, Tokyo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
Shallow uniform impurity diffusion regions in a semiconductor substrate can be formed through the steps of forming an insulating film having a window on the semiconductor substrate, forming a semiconductor layer on the insulating film and semiconductor substrate exposed at the window, and diffusing a specified impurity from this semiconductor layer into the semiconductor substrate with the melt of semiconductor layer by a high energy beam such as a laser. Simultaneously, the melted semiconductor layer is recrystallized and is used as a contact electrode having a low resistance and extending from the impurity diffusion region. Diffusion of the impurity into the semiconductor layer, which is the impurity diffusion source, can be performed at the time of forming the semiconductor layer or after the formation of the semiconductor layer.