Patent ID: 8920664

Claim:
A pattern forming method, comprising: forming a physical guide that includes a first predetermined pattern in a first region on a lower layer film, and includes a second predetermined pattern and a dummy pattern in a second region on the lower layer film; forming a block polymer inside the physical guide; making the block polymer microphase-separated to form a pattern having a first polymer section and a second polymer section; removing the second polymer section to form a hole pattern; processing the lower layer film after removal of the second polymer section, with the physical guide and the first polymer section used as a mask, and transferring shapes of the hole patterns in the first predetermined pattern and the second predetermined pattern to the lower layer film while not transferring a shape of the hole pattern in the dummy pattern to the lower layer film, by the processing of the lower layer film, wherein the first predetermined pattern, the second predetermined pattern and the dummy pattern respectively have hole shapes, and a diameter of the dummy pattern is smaller than 60 nm or larger than 76 nm, the first polymer section is formed on side wall surfaces and bottom surfaces of the first predetermined pattern, the second predetermined pattern and the dummy pattern, the second polymer section is formed in midsections of the first predetermined pattern, the second predetermined pattern and the dummy pattern, and surrounded by the first polymer section, the dummy pattern is connected with the second redetermined pattern, and wherein the lower layer film is a hard mask and a reflection preventive film formed on a film to be processed, a resist film is formed on the reflection preventive film, and the resist film is patterned by photolithography to form the physical guide, and the physical guide is formed on the reflection preventive film by an imprinting process.