Patent ID: 6281133
Filing Date: 2001-08-28
Classification: H01L

Abstract:
A method for forming an inter-layer dielectric layer, comprising:providing a substrate on which a plurality of first polysilicon lines, a first inter-layer dielectric layer on the substrate and the first polysilicon lines, and a plurality of second polysilicon lines on the first inter-layer dielectric layer are formed;forming a second inter-layer dielectric layer to cover the second polysilicon lines and fill spaces between the second polysilicon lines;forming a spin-on glass layer on the second inter-layer dielectric layer;etching back the spin-on glass layer and the second inter-layer dielectric layer using a top surface of the second polysilicon lines as etching end points;forming a cover layer on the second polysilicon lines and portions of the second inter-layer dielectric layer remaining between the second polysilicon lines; andforming an oxide layer on the cover layer.