Optical module and method of manufacturing optical module

Patent metadata

Field	Value
Publication number	US-2024045166-A1
Application number	US-202318221178-A
Country	US
Kind code	A1
Filing date	Jul 12, 2023
Priority date	Aug 4, 2022
Publication date	Feb 8, 2024
Grant date	—

Abstract

An optical module includes an optical component, a substrate including a main surface, a mount portion provided on the main surface of the substrate, and at least one measurement reference portion provided on the main surface of the substrate at a position apart from the mount portion. The substrate mounts the optical component thereon. The mount portion is configured to mount the optical component thereon. The measurement reference portion includes a reference point that becomes a height reference when measuring a mount height of the optical component.

First claim

What is clamed is:

1 . An optical module comprising:
an optical component; a substrate including a main surface, the substrate mounting the optical component thereon; a mount portion provided on the main surface of the substrate, the mount portion being configured to mount the optical component thereon; and at least one measurement reference portion provided on the main surface of the substrate at a position apart from the mount portion, the measurement reference portion including a reference point that becomes a height reference when measuring a mount height of the optical component.

2 . The optical module according to claim 1 ,
wherein the mount portion includes a mount surface that mounts the optical component thereon, and the measurement reference portion includes a reference surface including the reference point, and wherein the mount surface and the reference surface have a predetermined positional relationship in a thickness direction of the substrate.

3 . The optical module according to claim 2 ,
wherein the mount surface and the reference surface have a positional relationship in which the mount surface and the reference surface have a same height in the thickness direction of the substrate.

4 . The optical module according to claim 2 ,
wherein the mount portion includes a first metal foil layer formed on the main surface of the substrate, and a first metal plating layer formed on the first metal foil layer, wherein the measurement reference portion includes a second. metal foil layer formed on the main surface of the substrate, and a second metal plating layer formed on the second metal foil layer, wherein a surface of the first metal plating layer includes the mount surface, and a surface of the second metal plating layer includes the reference surface.

5 . The optical module according to claim 1 , wherein the measurement reference portion includes a surface made by a metal.

6 . The optical module according to claim 1 ,
wherein the at least one measurement reference portion includes a plurality of measurement reference portions, and wherein the plurality of measurement reference portions are disposed on the main surface of the substrate so as to surround the mount portion.

7 . The optical module according to claim 1 ,
wherein the at least one measurement reference portion includes a plurality of measurement reference portions, and wherein the plurality of measurement reference portions are not overlapped with the optical component.

8 . The optical module according to claim 1 ,
wherein the at least one measurement reference portion includes a plurality of measurement reference portions, and wherein the plurality of measurement reference portions are located adjacent to respective corners of the mount portion.

9 . The optical module according to claim 1 , further comprising:
a solder resist layer formed on the main surface of the substrate so as to fill a space between the mount portion and the measurement reference portion, wherein a groove separating the mount portion and the measurement reference portion is formed in the solder resist layer.

10 . The optical module according to claim 9 , wherein the measurement reference portion has a circular shape when the measurement reference portion is viewed from a direction perpendicular to the main surface of the substrate, and the groove is formed so as to surround the measurement reference portion.

11 . The optical module according to claim 9 , wherein the groove has a linear shape.

12 . The optical module according to claim 9 , wherein the groove is formed so as to surround the mount portion.

13 . The optical module according to claim 1 further comprising:
a solder resist layer formed on the main surface of the substrate,
wherein the at least one measurement reference portion includes a plurality of measurement reference portions, and
wherein a plurality of grooves respectively separating the mount portion and the plurality of measurement reference portions are formed in the solder resist layer.

14 . The optical module according to claim 1 , wherein the optical component includes a plurality of light incoming/outgoing portions each having an optical axis extending in a first direction on a plane parallel to the main surface, and the plurality of light incoming/outgoing portions are arranged along a second direction intersecting the first direction on the plane parallel to the main surface.

15 . A method of manufacturing an optical module, the method comprising:
preparing an optical component and a substrate; forming a mount portion to mount the optical component thereon, on a main surface of the substrate; forming at least one measurement reference portion on the main surface of the substrate at a position apart from the mount portion, the at least one measurement reference portion including a reference point that becomes a height reference when measuring a mount height of the optical component; and mounting the optical component on the mount portion and adjusting a height of the optical component with a height of the measurement reference portion being the height reference.

16 . The method of manufacturing an optical module according to claim 15 ,
wherein, in the forming of the mount portion, a first metal foil layer is formed on the main surface of the substrate and a first metal plating layer is formed on the first metal foil layer, wherein, in the forming of the measurement reference portion, a second metal foil layer is formed on the main surface of the substrate and a second metal plating layer is formed on the second metal foil layer, wherein the first metal layer and the second metal foil layer are formed in a same process, and the first metal plating layer and the second metal plating layer are formed in a same process.

Assignees

• Sumitomo Electric Industries

Inventors

• Shimada Kensaku
• Inoue Takeshi
• Nagasaki Taisuke
• Yokochi Toshihisa

Classifications

• B32B15/018

  one layer being formed of a noble metal or a noble metal alloy · CPC title

• B32B2255/06

  on metal layer · CPC title

• B32B2255/205

  Metallic coating · CPC title

• B32B15/043

  of metal (B32B15/01 takes precedence) · CPC title

• G02B7/003 Primary

  Alignment of optical elements (G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822) · CPC title