Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
209 words
In a method for producing a smooth and continuous pressure bonded layer of a material, selected from the group consisting of conductive, semiconductive, superconductive and insulating materials, on a base material through the driving force of a pulsed laser, the improvement comprising in combination therewith the steps of (a) selecting a laser transparent substrate, (b) applying thereto a thin polymeric film, where said polymer is characterized by a high optical coefficient of absorption to the wavelength of said laser, (c) applying to said polymeric film a thin layer of said material for pressure bonding to said base material, (d) placing said base material in close proximity to said thin layer of material, and (e) directing pulsed laser energy through said transparent substrate toward said polymeric film and said layer of material to be pressure bonded, whereby said laser energy is absorbed by said polymer causing heating and vaporization thereof to a controlled depth of said polymeric film, leaving remaining portions of said polymeric film unvaporized after said depth, to act as support for said thin layer of material to be pressure bonded, said vaporization providing the necessary pressure to blow-off said remaining portions of polymeric film, whereby to propel said material for pressure bonding on to said base material.
Claim 2
Dependent Claim
209 words
In a method for producing a smooth and continuous pressure bonded layer of a material, selected from the group consisting of conductive, semiconductive, superconductive and insulating materials, on a base material through the driving force of a pulsed laser, the improvement comprising in combination therewith the steps of (a) selecting a laser transparent substrate, (b) applying thereto a thin polymeric film, where said polymer is characterized by a high optical coefficient of absorption to the wavelength of said laser, (c) applying to said polymeric film a thin layer of said material for pressure bonding to said base material, (d) placing said base material in close proximity to said thin layer of material, and (e) directing pulsed laser energy through said transparent substrate toward said polymeric film and said layer of material to be pressure bonded, whereby said laser energy is absorbed by said polymer causing heating and vaporization thereof to a controlled depth of said polymeric film, leaving remaining portions of said polymeric film unvaporized after said depth, to act as support for said thin layer of material to be pressure bonded, said vaporization providing the necessary pressure to blow-off said remaining portions of polymeric film, whereby to propel said material for pressure bonding on to said base material.
Claim 3
Dependent Claim
22 words
The method according to claim 1 wherein said material to be pressure bonded is gold, a gold alloy, palladium, or palladium alloy.
Claim 4
Dependent Claim
27 words
The method according to claim 1 wherein the method is practiced in a controlled environment to minimize oxidation of said material to be bonded and base material.
Claim 5
Dependent Claim
21 words
The method according to claim 1 wherein the material to be bonded is non-oxidizing and is conducted in an air environment.
Claim 6
Dependent Claim
24 words
The method according to claim 1 wherein said laser transparent substrate is a member selected from the group consisting of glass, quartz and sapphire.
Claim 7
Dependent Claim
29 words
The method according to claim 1 wherein said laser transparent substrate is a polymer having an optical coefficient of absorption of less than about 10 1 cm -1 .
Claim 8
Dependent Claim
13 words
The method according to claim 2 wherein the base material is a metal.
Claim 9
Dependent Claim
31 words
The method according to claim 1 wherein said laser is an excimer laser and said polymeric film has an optical coefficient of absorption of at least 2×10 4 cm -1 .