Non-volatile storage having a connected source and well
View Patent ↗A non-volatile storage device is disclosed that includes a set of connected non-volatile storage elements formed on a well, a bit line contact positioned in the well, a source line contact positioned in the well, a bit line that is connected to the bit line contact, and a source line that is connected to the source line contact and the well.
1. A method for fabricating non-volatile storage, comprising:
forming a first dielectric layer on a well;
forming a first gate layer on said first dielectric layer;
forming a second dielectric layer on said first gate layer;
forming a second gate layer on said second dielectric layer;
creating source/drain regions, bit line contacts and source line contacts in said well;
creating bit lines that connect to said bit line contacts and that do not connect to said well; and
creating a source line that connects to said source line contacts and connects to said well.
2. A method according to claim 1 , wherein:
said creating bit lines comprises forming conductive lines that terminate at said bit line contacts.
3. A method according to claim 1 :
said creating a source line includes forming a conductive line that passes through said source line contacts and protrudes into said well.
4. A method according to claim 1 , wherein:
said creating a source line includes forming a conductive line that extends into said source line contacts and extends into said well.
5. A method according to claim 4 , wherein:
said forming a first dielectric layer, forming a first gate layer, forming a second dielectric layer, forming a second gate layer, and creating source/drain regions comprises creating a set of NAND strings that each have its own source line contact and bit line contact; and
said creating said source line comprises adding a conductive line that connects to each source line contact for said set of NAND strings.
6. The method of claim 1 wherein the non-volatile storage is a three dimensional memory structure.
7. The method of claim 1 wherein the non-volatile storage is a three dimensional memory array.