Adhesive bonding composition and electronic components prepared from the same
A polymerizable composition includes at least one monomer, a photoinitiator capable of initiating polymerization of the monomer when exposed to light, and a phosphor capable of producing light when exposed to radiation (typically X-rays). The material is particularly suitable for bonding components at ambient temperature in situations where the bond joint is not accessible to an external light source. An associated method includes: placing a polymerizable adhesive composition, including a photoinitiator and energy converting material, such as a down-converting phosphor, in contact with at least two components to be bonded to form an assembly; and, irradiating the assembly with radiation at a first wavelength, capable of conversion (down-conversion by the phosphor) to a second wavelength capable of activating the photoinitiator, to prepare items such as inkjet cartridges, wafer-to-wafer assemblies, semiconductors, integrated circuits, and the like.
1. An inkjet cartridge, comprising a printhead and a cartridge body, wherein the printhead and cartridge body are held together by a cured adhesive composition obtained by curing of a curable adhesive composition, wherein the curable adhesive composition comprises an organic vehicle comprising at least one polymerizable monomer; at least one photo-initiator responsive to a selected wavelength of light; and at least one energy converting material selected to emit said wavelength of light when exposed to a selected imparted radiation.
2. The inkjet cartridge of claim 1 , wherein said at least one energy converting material is an upconverting material.
3. The inkjet cartridge of claim 2 , wherein said imparted radiation is near infrared.
4. The inkjet cartridge of claim 1 , wherein said at least one energy converting material is a downconverting material.
5. The inkjet cartridge of claim 4 , wherein said imparted radiation is ionizing radiation.
6. The inkjet cartridge of claim 1 , wherein said cured adhesive composition comprises a thermoset resin.
7. The inkjet cartridge of claim 6 , wherein said thermoset resin is selected from the group consisting of: acrylics, phenolics, urethanes, epoxies, styrenes, and silicones.
8. The inkjet cartridge of claim 1 , wherein said at least one photoinitiator is selected from the group consisting of: benzoin ethers, benzil ketals, α-dialkoxyacetophenones, α-aminoalkylphenones, acylphosphine oxides, benzophenones/amines, thioxanthones/amines, and titanocenes.
9. The inkjet cartridge of claim 4 , wherein said first wavelength of radiation comprises X-rays and said second wavelength comprises light in the range from deep UV to IR.
10. The inkjet cartridge of claim 4 , wherein said downconverting material comprises dispersed inorganic particulates selected from the group consisting of: metal oxides; metal sulfides; doped metal oxides; and mixed metal chalcogenides.
11. The inkjet cartridge of claim 1 , wherein said curable adhesive composition further comprises inorganic particulates selected from the group consisting of: metals and metal alloys, ceramics and dielectrics, and metal-coated polymers.
12. The inkjet cartridge of claim 1 , wherein said curable adhesive composition further comprises an organic component selected from the group consisting of: solvents, viscosity modifiers, surfactants, dispersants, and plasticizers.
13. The inkjet cartridge of claim 1 , wherein the cartridge body comprises recessed channels and recessed terminal regions formed by molding.
14. The inkjet cartridge of claim 1 , wherein the cartridge body has at least two ink delivery slots formed therein, and wherein at least a portion of the cured adhesive composition is in a form of a bead between the at least two ink delivery slots.
15. The inkjet cartridge of claim 1 , wherein the cartridge body is formed from at least two pieces, which are also held together by the cured adhesive composition.