Directed Self-Assembly of Block Copolymer for Bit Patterned Media with Areal Density of 1.5 Teradot/Inch² and Beyond

Table 2

Sphere-forming PS-b-PDMS BCP materials.

Density (Td/in^2)	𝐿𝑜 (nm)	𝑀𝑛 (kg/mol)	PDI
1.3	24.0	13.5-b-4.0	1.07
1.5	22.3	1.3 𝑇 : 2.0 𝑇 : PS = 4 : 3 : 1 (wt./wt.)	mixed
2.0	19.3	12.0-b-2.8	1.09
2.4	17.6	10.0-b-2.5	1.08
3.0	15.7	8.5-b-2.2	1.14
3.2	15.2	3.0 𝑇 : 5.0 𝑇 : PS = 5 : 2 : 1 (wt./wt.)	mixed
5.0	12.2	7.0-b-1.5	1.05