×

Optical information recording disk

  • US 4,847,827 A
  • Filed: 06/28/1988
  • Issued: 07/11/1989
  • Est. Priority Date: 12/09/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. An optical information recording disk comprising:

  • a pair of substrates at least one of which has a signal recording layer formed thereon;

    spacer means for bearing circumferential portions of said substrates on first and second substrate bearing surfaces of said spacer means so that said substrates together with said spacer means form an interior space;

    means for fixedly joining said substrates and said spacer means by heating the disk;

    means for defining a notched portion in one of said first and second substrate bearing surfaces of said spacer means so that said notched portion extends through said spacer means to communicate the interior space with atmosphere outside the disk; and

    seal means for filling in said notched portion after said disk has been heated to form an airtight seal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×