Grinding And Subsequent Machining of Magnetic Disk Substrates
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Introduced here is a new method of preparing high quality substrates for the production of magnetic recording disks that improve manufacturing yields and costs. The new method proposed initially involves grinding raw substrates to make them flat, and then finishing them mechanically. The object is to produce flat substrates with an acceptable surface finish. Superficial grinding will easily produce a substrate flatness of less than 2 mils. Subsequent machining with, for example, a lathe, can easily produce an acceptable finish and resultant substrate flatness.