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:
May. 29, 2012
Filed:
Jun. 26, 2008
Hee Bok Kang, Chungcheongbuk-do, KR;
Jin Hong an, Gyeonggi-do, KR;
Suk Kyoung Hong, Gyeonggi-do, KR;
Hee Bok Kang, Chungcheongbuk-do, KR;
Jin Hong An, Gyeonggi-do, KR;
Suk Kyoung Hong, Gyeonggi-do, KR;
Hynix Semiconductor Inc., Kyoungki-do, KR;
Abstract
A phase change memory device using a multiple level write voltage is described. The phase change memory device includes a cell array unit including a phase change resistance cell positioned at an intersection of a word line and a bit line. A voltage selection adjusting unit is configured to select one of a plurality of multiple voltages in response to a voltage adjusting signal to output a driving voltage. A write driving unit is also configured to finely adjust the voltage level of the driving voltage in response to a voltage fine-adjusting signal to supply the driving voltage to the cell array unit.