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:
Mar. 07, 1989
Filed:
Jul. 13, 1987
Takao Ito, Ithaca, NY (US);
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A method of manufacturing a semiconductor apparatus is disclosed, in which in the method of isolating elements, is improved. A groove is cut in a semiconductor substrate. Elements are isolated from each other by embedding an insulating material in the groove, in two divided portions. The time required for depositing an insulating material is reduced, thereby forming a uniform insulation layer on the semiconductor substrate. Since the insulating material can be etched in a shorter period of time than was previously required, the etching process can be more finely controlled. Since a field oxide layer is formed by oxidizing an insulation layer formed for the first time, the field oxide layer can be provided without oxidizing those portions of the semiconductor substrate which lie near the groove. Consequently, the seminconductor substrate can be free from crystalline defects.