Ablative optical recording medium
Erasable recording medium comprising a dimer acid polyamide resin
Ablative infrared sensitive devices containing soluble naphthalocyanine dyes Patent #: 4492750
ApplicationNo. 07/002345 filed on 01/12/1987
US Classes:430/19, ERASABLE IMAGING346/135.1, Laminated, impregnated, or coated bases369/284, Radiation beam modified or controlling (e.g., photosensitve, optical track)369/94, Having layered storage medium428/69, Filled with gas other than air; or under vacuum430/21, RETRIEVING IMAGE MADE USING RADIATION IMAGERY430/270.16, Organometallic containing430/906, Polyamide or polyurethane430/944, INFRARED430/945, LASER BEAM540/122, Phthalocyanines540/123, Hetero ring attached directly or indirectly to the phthalocyanine ring system by nonionic bonding540/128, Boron, germanium, phosphorus or silicon containing540/129, Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the phthalocyanine ring system (e.g., tetracarboxy copper phthalocyanine, etc.)540/130, Having -C(=X)-, wherein X is chalcogen, attached indirectly to ring carbon of the phthalocyanine ring system by nonionic bonding (e.g., phthalocyanine acetic acids, etc.)540/133, Nitrogen bonded directly to the sulfonyl group540/139, Metal containing540/140Heavy metal or aluminum containing
ExaminersPrimary: Michl, Paul R.
Assistant: Hamilton, Cynthia
Attorney, Agent or Firm
International ClassesG11B 7/244 (20060101)
G11B 7/24 (20060101)
G11B 7/248 (20060101)
AbstractProvided is an optical information recording medium and a method of recording information thereon. The information layer of the recording medium comprises an anthracyanine or phenanthracyanine chromophore compound. In a preferred embodiment, the chromophore is substituted with at least one substituent conferring film forming properties to the chromophore, e.g., a monomer or oligomeric substituent comprised of acid, amide or ester units. The resulting information layer exhibits strong absorption in the range of from about 780-850 nm. Employing an anthracyanine or phenanthracyanine chromophore substituted with a film forming substituent further offers the advantages of a single component material exhibiting good thermomechanical properties.