Optical coupling device, manufacturing method thereof, and power conversion system
First Claim
1. An optical coupling device comprising:
- a first element mounted over a first mounting part;
a first lead electrically coupled to the first element;
a first resin covering the first element;
a second element mounted over a second mounting part;
a second lead electrically coupled to the second element; and
a second resin arranged between the second element and the first resin,wherein the second resin is a cured product of a composition having an epoxy resin and a curing agent, and has a light transmission property,wherein the second resin contains an aromatic ring and an alicyclic compound,wherein the cured product of the second resin includes silica in a ratio of 60 to 90 wt % based on the weight of the epoxy resin composition, andwherein the cured product is a compound represented by the formula;
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Accused Products
Abstract
In order to improve properties, an optical coupling device has a potting resin and an internal mold resin between a light emitting element and a light receiving element. The internal mold resin is a cured product of a composition having an epoxy resin and a curing agent, and is a resin having a light transmission property. Additionally, the internal mold resin MRI contains an aromatic ring and an alicyclic compound. By thus lowering the ratio of an aromatic ring in the epoxy resin, deterioration of the resin can be suppressed. Thereby, a decrease in the light transmission property of the epoxy resin cured product can be suppressed, and degradation of the transmission performance for an optical signal can be reduced.
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Citations
17 Claims
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1. An optical coupling device comprising:
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a first element mounted over a first mounting part; a first lead electrically coupled to the first element; a first resin covering the first element; a second element mounted over a second mounting part; a second lead electrically coupled to the second element; and a second resin arranged between the second element and the first resin, wherein the second resin is a cured product of a composition having an epoxy resin and a curing agent, and has a light transmission property, wherein the second resin contains an aromatic ring and an alicyclic compound, wherein the cured product of the second resin includes silica in a ratio of 60 to 90 wt % based on the weight of the epoxy resin composition, and wherein the cured product is a compound represented by the formula; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A manufacturing method of an optical coupling device, comprising the steps of:
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(a) providing both a first lead frame having a first mounting part and a first lead and a second lead frame having a second mounting part and a second lead; (b) mounting a first element over the first mounting part; (c) forming a first resin over the first element; (d) mounting a second element over the second mounting part; and (e) facing the first resin over the first element and the second element with each other so as to form a second resin between the second element and the first resin, wherein the second resin is a cured product of a composition having an epoxy resin and a curing agent, and has a light transmission property, wherein the epoxy resin contains an aromatic ring and an alicyclic compound, wherein the cured product of the second resin includes silica in a ratio of 60 to 90 wt % based on the weight of the epoxy resin composition, and wherein the cured product is a compound represented by the formula; - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A power conversion system comprising an amplifier circuit part and an optical coupling part to be coupled to the amplifier circuit part,
wherein the optical coupling part has: -
a first element mounted over a first mounting part; a first lead electrically coupled to the first element; a first resin covering the first element; a second element mounted over a second mounting part; a second lead electrically coupled to the second element; and a second resin arranged between the second element and the first resin, and wherein the second resin is a cured product of a composition having an epoxy resin and a curing agent, and has a light transmission property, wherein the second resin contains an aromatic ring and an alicyclic compound, wherein the cured product of the second resin includes silica in a ratio of 60 to 90 wt % based on the weight of the epoxy resin composition, and wherein the cured product is a compound represented by the formula; - View Dependent Claims (17)
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Specification