公开(公告)号：US3876991A

公开(公告)日：1975-04-08

申请号：US37805273

申请日：1973-07-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： NELSON JAMES THOMAS ,  ROSENZWEIG WALTER

IPC: G11C11/405 ,  G11C11/40 ,  G11C11/24

CPC classification number: G11C11/405

Abstract: Single select line, three transistor dynamic memory cells require precise control of the trilevel select line voltage to insure that only the intended state is selected. Typically, one transistor is associated with a write state; a second transistor, with a read state; and a third transistor, with the storage function. A dual threshold dynamic memory cell, wherein the threshold voltage of the write transistor is substantially different than the threshold voltage of the read transistor, significantly relaxes the precise select voltage control requirement. The different threshold voltages can be provided at the time of manufacture by using conventional techniques, such as selective ion implantation or selective gate oxidation.

公开(公告)号：US3603833A

公开(公告)日：1971-09-07

申请号：US3603833D

申请日：1970-02-16

Applicant: BELL TELEPHONE LABOR INC

Inventor： LOGAN RALPH ANDRE ,  ROSENZWEIG WALTER ,  WIEGMANN WILLIAM

IPC: C30B29/40 ,  G09F9/33 ,  H01L33/00 ,  H05B33/16

CPC classification number: H01L33/0004 ,  C30B29/40 ,  G09F9/33 ,  H01L33/00 ,  Y10S148/049 ,  Y10S148/107 ,  Y10S148/119

Abstract: An electroluminescent PN junction gallium phosphide diode is fabricated with the P-type zone rich in zinc oxygen pairs and the N-type zone rich in isoelectronic nitrogen. In this diode, the apparent color of the emitted light can be controlled by varying the electrical current in the diode, from the red through the yellow to the green portions of the color spectrum. Thereby, an electroluminescent diode device is afforded, having a threefold (or more) positive standby signal characteristic.