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:
Jan. 24, 1995
Filed:
Jun. 30, 1992
Masami Aoki, Kanagawa, JP;
Hiroshi Takato, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A manufacturing method of semiconductor devices and semiconductor devices isolated by a trench portion. The trench portion is refilled with a Si epitaxial growth layer. The trench has a first insulating layer on its side wall and a second insulating layer formed by the oxidation in the self-alignment manner, as a cap layer, on the top portion of the trench. A semiconductor device formed on the substrate is isolated by the trench. The excessive leakage currents created by the stress between the substrate and the Si epitaxial layer are decreased. The concentration of the field effect at the corner portion of the trench is suppressed by the cap layer. The refilling step can be also made to a trench having the wider opening and another trench having the narrower opening simultaneously and uniformly.