Patent ID: 6566705
Filing Date: 2003-05-20
Classification: H01L

Abstract:
An EPROM cell comprising:a P-type semiconductor substrate having a P well implanted therein to form a surface active area having a defined boundary, the active area includes; a poly gate region provided at a further surface portion of the substrate; lightly doped first and second regions aligned with the poly gate region defining a channel region there between; oxide spacers at the sides of the poly gate region above portions of the lightly doped first and second regions; heavily doped source and drain regions provided at surface portions of the substrate with the source region being over at least a portion of the lightly doped first region and in alignment with the channel region and a first one of the oxide spacers and the drain region being over at least a portion of the lightly doped second region and in alignment with the channel region and a second one of the oxide spacers; and the channel having first and second ends and center region with the lightly doped first region being positioned at the boundary at a first location and extending towards the center region from the boundary and being position not to contact either the first or second ends and the lightly doped second region being positioned at the boundary at a second location opposite from the first location and extending towards the center region from the boundary and being position not to contact either the first or second ends.