Patent ID: 6124215
Filing Date: 2000-09-26
Classification: H01L

Abstract:
A method of planarizing a spin-on material applied to a semiconductor wafer substrate having an irregular surface with high and low portions, the method comprising the steps of:holding said semiconductor wafer substrate onto a spin-on-glass coater spin table;providing an enclosure comprising a cup and moveable lid assembly which completely cover said spin-on-glass coater spin table;dispensing said spin-on material onto the surface of said semiconductor wafer substrate and rotating said semiconductor wafer substrate at a first low rotation speed to disperse the spin-on material across the surface of the semiconductor wafer substrate;after dispersing the spin-on material across the surface of the semiconductor wafer substrate, contacting the surface of the semiconductor wafer substrate with a plate and applying a pressure force between the plate and the semiconductor wafer substrate and rotating said semiconductor wafer substrate at a second rotation speed, said second rotation speed being faster than said first low rotation speed;and then removing said semiconductor wafer substrate from the spin-on-glass coater spin table;and then first heating the spin-on material layer to remove solvents and low-boiling point organic materials; andand then curing the spin-on layer at a temperature which causes cross-linking of the spin-on material.