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. 23, 1996
Filed:
Sep. 07, 1994
Paolo Ghezzi, Rivolta D'Adda, IT;
Alfonso Maurelli, Sulbiate, IT;
SGS-Thomson Microelectronics, S.r.1., Milan, IT;
Abstract
A process for the manufacture of an integrated voltage limiter and stabilizer component in a flash EEPROM memory device comprises a step of formation of an N type lightly doped well on a single-crystal silicon substrate; a step of formation of an active area on the surface of said N type well; a step of growth of a thin gate oxide layer over said active area; a step of implantation of a first heavy dose of N type dopant into said N type well to obtain an N type region; a step of implantation of a second heavy dose, higher than said first heavy dose, of N type dopant into said N type region to obtain an N+ contact region to both the N type well and said N type region; a step of implantation of a third heavy dose, higher than said first heavy dose, of P type dopant into said N type region to form a P+ region.