Patent ID: 6756632
Filing Date: 2004-06-29
Classification: G11C,H01L,H03K

Abstract:
An integrated circuit comprising:a source for a signal; a circuit; a reprogrammable non-volatile switch for selectively connecting said source to said circuit, said switch comprising: a MOS transistor having a first terminal and a spaced apart second terminal with a channel between said first terminal and said second terminal; a tunneling insulating layer over said channel, and a gate on said tunneling insulating layer and on said channel; said first terminal is connected to said source, and said second terminal is connected to said circuit; a non-volatile memory cell having a first region and a spaced apart second region with a channel therebetween, a first insulating layer over said channel; a floating gate on said first insulating layer and spaced apart from a first portion of said channel, wherein said first portion of said channel is adjacent to said first region; a control gate on said first insulating layer and spaced apart from a second portion of said channel; wherein said second portion of said channel is adjacent to said second region; and a second insulating layer between said floating gate and said control gate; wherein said first insulating layer permits the injection of charges from said channel onto said floating gate, and said second insulating layer permits the Fowler-Nordheim tunneling of electrons between said floating gate and said control gate; said gate of said MOS transistor connected to said second region of said non-volatile memory cell; wherein said MOS transistor is connectable to a first voltage, said control gate is connectable to a second voltage, and said first region is connectable to a third voltage permitting charges to tunnel through said tunneling insulating layer of said MOS transistor to said second region, into said channel of said non-volatile memory cell, and being injected onto said floating gate for programming; wherein said control gate is connectable to a fourth voltage for removal of charges from said floating gate; and wherein said first region is connectable to a fifth voltage to control the connection of said source to said circuit depending upon the state of said floating gate.