Patent ID: 8993060
Filing Date: 2015-03-31
Classification: B05D,B81C,B82Y,G03F,G11B,Y10T

Abstract:
1. A method comprising: applying a polymer brush layer to a substrate; coating the brush layer with a photoresist layer; patterning the photoresist layer with a regular dot pattern in a bit area and a non-regular servo pattern in a servo area using a lithography process; forming a first hard mask which covers the non-regular servo pattern in the servo area; depositing a block copolymer which self-assembles in the bit area to form curvilinearly shaped domains guided by the regular dot pattern, the period of the regular dot pattern being between about 2 times and about 10 times the period of the curvilinearly shaped domains, the block copolymer comprising a magnetic component and a non-magnetic component, the magnetic component forming the curvilinearly shaped domains.