Patent assignee · US · COMPANY

Ramtron Corporation

25Patents
0Active
25Granted
35Portfolio score

Filing activity: Mar 24, 1980 → Dec 12, 1991

Most-cited patents

PatentTitleAreaCited byStatus
US4873664A Self restoring ferroelectric memory Physics 239 Expired
US4809225A Memory cell with volatile and non-volatile portions having ferroelectric capacitors Physics 221 Expired
US4888733A Non-volatile memory cell and sensing method Physics 173 Expired
US4853893A Data storage device and method of using a ferroelectric capacitance divider Physics 166 Expired
US5005102A Multilayer electrodes for integrated circuit capacitors Emerging Cross-Sectional Technologies 151 Expired
US4800543A Timepiece communication system Physics 113 Expired
US5206788A Series ferroelectric capacitor structure for monolithic integrated circuits and method Emerging Cross-Sectional Technologies 88 Expired
US5142437A Conducting electrode layers for ferroelectric capacitors in integrated circuits and method Emerging Cross-Sectional Technologies 66 Expired
US4893272A Ferroelectric retention method Physics 60 Expired
US4914627A One transistor memory cell with programmable capacitance divider Physics 56 Expired
US4707897A Monolithic semiconductor integrated circuit ferroelectric memory device, and methods of fabricating and utilizing same Emerging Cross-Sectional Technologies 39 Expired
US5043790A Sealed self aligned contacts using two nitrides process Emerging Cross-Sectional Technologies 39 Expired
US4918654A SRAM with programmable capacitance divider Physics 38 Expired
US4910708A Dram with programmable capacitance divider Physics 38 Expired
US5170242A Reaction barrier for a multilayer structure in an integrated circuit Electricity 32 Expired
US5104822A Method for creating self-aligned, non-patterned contact areas and stacked capacitors using the method Emerging Cross-Sectional Technologies 29 Expired
US5024964A Method of making ferroelectric memory devices Electricity 27 Expired
US5109357A DRAM memory cell and method of operation thereof for transferring increased amount of charge to a bit line Electricity 26 Expired
US5162890A Stacked capacitor with sidewall insulation Emerging Cross-Sectional Technologies 25 Expired
US5214300A Monolithic semiconductor integrated circuit ferroelectric memory device Electricity 21 Expired
US4713157A Combined integrated circuit/ferroelectric memory device, and ion beam methods of constructing same Electricity 17 Expired
US5117177A Reference generator for an integrated circuit Physics 16 Expired
US5216281A Self sealed aligned contact incorporating a dopant source Electricity 11 Expired
US5134310A Current supply circuit for driving high capacitance load in an integrated circuit Physics 11 Expired
US5075817A Trench capacitor for large scale integrated memory Emerging Cross-Sectional Technologies 7 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.