Optical module and manufacturing method of optical module for optical communication
According to one embodiment, an optical module includes: a lid having a first face and a second face, the lid including a bump, a wiring, and a through via; an optical circuit element; a first integrated circuit (IC); a first block bonded to the first IC by a first adhesive; a temperature control element bonded to the optical circuit element; and a housing having an opening and a third face provided inside the opening, the housing being configured to house the first IC, the optical circuit element, the first block, and the temperature control element, the third face being bonded to the first block and the temperature control element by a second adhesive, the housing being hermetically sealed with the lid.
1. An optical module comprising:
a lid having a first face and a second face opposite to the first face, the lid including a bump, a wiring, and a through via, the bump being formed on the first face, the wiring being formed on the second face, the through via being configured to electrically connect the first face to the second face;
an optical circuit element mounted on the second face by flip-chip assembly;
a first integrated circuit (IC) mounted on the second face by flip-chip assembly, the first IC being electrically connected to the optical circuit element through the wiring and electrically connected to the bump through the through via;
a first block bonded to the first IC by a first adhesive;
a temperature control element bonded to the optical circuit element; and
a housing having an opening and a third face provided inside the opening, the housing being configured to house the first IC, the optical circuit element, the first block, and the temperature control element, the third face being bonded to the first block and the temperature control element by a second adhesive, the housing being hermetically sealed with the lid.
2. The optical module according to claim 1 ,
wherein the lid includes glass as a base material.
3. The optical module according to claim 1 ,
wherein the second adhesive has a thickness larger than a thickness of the first adhesive.
4. The optical module according to claim 1 ,
wherein the housing includes a heat radiation member and the third face is provided on the heat radiation member.
5. The optical module according to claim 4 ,
wherein the third face is configured to face the second face inside the opening.
6. The optical module according to claim 4 ,
wherein the heat radiation member has a fence on the third face, the fence being configured to hold the second adhesive inside the fence.
7. The optical module according to claim 1 , further comprising a second IC and a second block,
wherein the second IC is mounted on the second face by flip-chip assembly and electrically connected between the through via and the first IC, and
wherein the third face is bonded to the second IC by the second adhesive.
8. A manufacturing method of an optical module comprising:
preparing a lid having a bump formed on a first face, a wiring formed on a second face opposite to the first face, a through via being configured to electrically connect the first face to the second face;
bonding a first integrated circuit (IC) to a first block by a first adhesive;
mounting an optical circuit element to a temperature control element;
mounting the first IC and the temperature control element on the second face by flip-chip assembly, electrically connecting the first IC to the optical circuit element through the wiring, and electrically connecting the first IC to the bump through the through via;
applying the second adhesive on the second face provided inside an opening of a housing;
holding the first block, the first IC, the temperature control element, and the optical circuit element inside the opening, and bonding the third face of the housing to the first block and the temperature control element by the second adhesive; and
hermetically sealing the housing with the lid.