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:
Sep. 30, 2025
Filed:
Nov. 22, 2021
SK Keyfoundry Inc., Cheongju-si, KR;
Mingyu Lim, Cheongju-si, KR;
SK keyfoundry Inc., Cheongju-si, KR;
Abstract
A mask-programmable read only memory (ROM) is provided. The mask ROM includes first and second unit cells; an isolation gate electrode that isolates the first unit cell and the second unit cell; and a bit line that crosses the first and second unit cells. The first unit cell includes: a first source contact and a first bit line contact which are disposed on a semiconductor substrate; and a first gate electrode disposed between the first source contact and the first bit line contact. The second unit cell includes: a second source contact and a second bit line contact which are disposed on the semiconductor substrate; a second gate electrode disposed between the second source contact and the second bit line contact; and a via structure electrically connected to the second bit line contact. The bit line is connected to the via structure of the second unit cell.