Optical disk

Details Optical disk Optical disk

2007-08-21

2007-08-21

Hess, Bruce H. (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C430S270110

Reexamination Certificate

active

10918050

ABSTRACT:
The present invention discloses an optical disk formed according to double injection molding of forming an area of the optical disk on which a recording film is formed, namely, an outer circumferential area by using polycarbonate that is an amorphous polymer, and forming an area of the optical disk on which the recording film is not formed, namely, an inner circumferential area by using a semi-crystalline polymer having a similar elastic modulus to that of polycarbonate and having durability to a static fatigue, especially polyamide. Therefore, the optical disk is efficiently prevented from being damaged by restricting growth of cracks near its hole, obtaining excellent optical characteristics as an information recording medium.

REFERENCES:
patent: 5987004 (1999-11-01), Suwabe
patent: 6214430 (2001-04-01), Kim et al.
patent: 2002/0029256 (2002-03-01), Zintel et al.
patent: 63292475 (1988-11-01), None
patent: WO 02/05118 (2002-01-01), None
XP-002210614, Jun. 8, 2002.

Affiliated with

Also associated with

Rating

Optical disk does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3840255