Patent ID: 6762089
Filing Date: 2004-07-13
Classification: H01L

Abstract:
A method for forming a memory device, comprising:provide a memory substrate including a substrate, a memory cell area, a peripheral circuit area, a first dielectric layer and a first metal layer, wherein the memory cell area and the peripheral circuit area are formed on the substrate, the first dielectric layer is formed on the memory cell area and the peripheral circuit area, and the first metal layer is formed on the first dielectric layer; depositing an insulating layer on the first metal layer and the first dielectric layer not covered with the first metal layer; depositing a shielding metal layer on the insulating layer; etching the insulating layer and the shielding metal layer, so as to remove the insulating layer and the shielding metal layer over the first metal layer, and the shielding metal layer over the peripheral circuit area; forming a second dielectric layer on the shielding metal layer, the insulating layer not covered with the shielding metal layer, and the first metal layer not covered with the shielding metal layer and the insulating layer; and forming a second metal layer on the second dielectric layer.