Transfer-molding resin composition for use to manufacture ink jet recording head, and ink jet recording head manufactured by using the same

An ink jet recording head comprising ink discharge ports for discharging ink, a fluid passage for introducing the ink to said discharge ports, and energy generating devices for supplying ink discharging energy to the ink present in said fluid passage, said fluid passage constituted by forming, on a substrate, an outer frame made of a hardened resin obtained by transfer molding, wherein

• a transfer-molding resin composition which is a material of said hardened resin is composed of an epoxy resin, a hardening agent, an agent for enhancing hardening and a filler, and
• an amount of said filler is in a range from 0.5 to 17.0 wt. %.

An ink jet recording head according to 3 or 4, wherein said energy generating devices are electricity-to-heat conversion members each of which generates heat upon receiving electric energy causing the ink to undergo a phase change and to be discharged.

An ink jet recording head comprising:

• an energy generating element for generating energy utilized for discharging ink, a substrate having said energy generating element, a discharge port for discharging ink, an ink flow path communicating with said discharge port to supply ink and an outer frame having a groove to be formed to said ink flow path and defining said ink flow path by being jointed to said substrate,
• wherein said outer frame is formed by transfer molding with a solid layer comprising a soluble resin provided at a portion corresponding to said ink flow path on said substrate as a part of a mold which is cured, wherein a transfer molding resin constituting said outer frame includes a filler agent of from 0.5-17.0 wt %.

An ink jet recording head comprising a fluid passage constituted by forming, on a substrate, an outer frame made of a hardened resin obtained by transfer molding, wherein

• a transfer-molding resin composition which is a material of said hardened resin is a resin composition obtained by mixing an epoxy resin, which is fluid at room temperature, with a B-stage epoxy resin composition at least composed of an epoxy resin, a hardening agent, and an agent for enhancing hardening.

An ink jet recording head having ink discharge ports for discharging ink, a fluid passage for introducing the ink to said discharge ports, and energy generating devices for supplying ink discharging energy to the ink present in said fluid passage, said fluid passage constituted by forming, on a substrate, an outer frame made of a hardened resin obtained by transfer molding, wherein

• a transfer-molding resin composition which is a material of said hardened resin is a resin composition obtained by mixing an epoxy resin, which is fluid at room temperature, with a B-stage epoxy resin composition at least composed of an epoxy resin, a hardening agent, and an agent for enhancing hardening.

An ink jet recording head according to claims 11 or 35, wherein said ink discharging energy generating devices are electricity-to-heat conversion members each of which generates heat upon receiving electric energy causing the ink to undergo a phase change and to be discharged.

An ink jet recording head according to claims 11 or 35, wherein said ink jet recording head is a full-line type recording head having a plurality of said ink discharge ports disposed to cover an overall width of a recording region of a recording medium.

An ink jet recording head comprising:

• an energy generating element for generating energy utilized for discharging ink, a substrate having said energy generating element, a discharge port for discharging ink, an ink flow path communicated with said discharge port to supply ink and an outer frame having a groove to be formed to said ink flow path and defining said ink flow path by being jointed to said substrate,
• wherein said outer frame is formed by transfer molding with a solid layer comprising a soluble resin provided with a portion corresponding to said ink flow path on said substrate as a part of a mold which is cured, wherein a transfer molding resin constituting said outer frame includes at least an epoxy resin having a polysulfide skeleton as a main chain.