Patent ID: 6943413

Claim:
An apparatus comprising: a first N-well; a second N-well; a first field oxide between the first and the second N-well; a second field oxide located at least partially above said second N-well; a P-type layer near a top of the second N-well; an oxide layer extending across an upper surface of the P-type layer, said oxide layer extending continuously without a gap from the first field oxide to the second field oxide; and a polysilicon layer having a thickness between 650 Angstroms and 1000 Angstroms and extending across an upper surface of the oxide layer and said polysilicon layer being in continuous contact without a gap in extending across said upper surface of the oxide layer so as to facilitate scattering of dopant material and said polysilicon layer being sized so as to produce in said P-type layer a dopant concentration for use in forming a P-N junction that operates more as a step junction than as a graded junction.