Abstract: An object of the present invention is to provide a hard disc which prevents alien bodies and rust from falling onto hard discs and securely holds the hard discs in parallel alignment. In a first basic structure of the hard disc spacer, the hard disc spacer is made of a metal and coated with a hard metal coating layer. In a second basic structure thereof, the hard disc spacer is made of a metal and coated with a ceramic coating layer. In a third basic structure thereof, the hard disc spacer is made of glass. In a first basic structure of the hard disc clamp, the hard disc clamp is made of a metal and coated with a hard metal coating layer. And in a second basic structure thereof, the hard disc clamp is made of a metal and coated with a ceramic coating layer.

Abstract: An object of the present invention is to provide a hard disc which prevents alien bodies and rust from falling onto hard discs and securely holds the hard discs in parallel alignment. In a first basic structure of the hard disc spacer, the hard disc spacer is made of a metal and coated with a hard metal coating layer.In a second basic structure thereof, the hard disc spacer is made of a metal and coated with a ceramic coating layer. In a third basic structure thereof, the hard disc spacer is made of glass. In a first basic structure of the hard disc clamp, the hard disc clamp is made of a metal and coated with a hard metal coating layer. And in a second basic structure thereof, the hard disc clamp is made of a metal and coated with a ceramic coating layer.