Optical module

Abstract

An optical module includes: a flexible board having a first surface on which a component is mounted and a second surface opposite to the first surface; a bottom electrode part having a bottom surface on which a heat release electrode is provided, the bottom electrode part mounted on the first surface of the flexible board; and a heat release member configured to absorb heat from the bottom electrode part and release the heat to outside. The heat release member is arranged close to said second surface of the flexible board at a position where the bottom electrode part is mounted.

1 . An optical module comprising:
 a flexible board having a first surface on which a component is mounted and a second surface opposite to the first surface;   a bottom electrode part having a bottom surface on which a heat release electrode is provided, the bottom electrode part mounted on said first surface of said flexible board; and   a heat release member configured to absorb heat from said bottom electrode part and release the heat to outside,   wherein said heat release member is arranged close to said second surface of said flexible board at a position where said bottom electrode part is mounted.   
     
     
         2 . The optical module as claimed in  claim 1 , wherein said flexible board is formed of a polyimide based material. 
     
     
         3 . The optical module as claimed in  claim 1 , wherein said heat release member is bonded to said second surface of said flexible board by a heat release adhesive. 
     
     
         4 . The optical module as claimed in  claim 1 , wherein a heat release sheet is arranged between said heat release member and said second surface of said flexible board. 
     
     
         5 . The optical module as claimed in  claim 4 , wherein said heat release sheet is a graphite sheet that is applied to said heat release member and said second surface of said flexible board. 
     
     
         6 . The optical module as claimed in  claim 4 , wherein said heat release sheet is a silicon heat release sheet having elasticity. 
     
     
         7 . The optical module as claimed in  claim 1 , further comprising a housing made of a metal to accommodate structural components including said flexible board and said bottom electrode part, wherein said heat release member is connected to said housing. 
     
     
         8 . The optical module as claimed in claim  7 , wherein said heat release member is formed as a part of said housing. 
     
     
         9 . The optical module as claimed in  claim 1 , wherein a top surface of said heat release member opposite to said second surface of said flexible board is a planar surface, and a portion of said flexible board on which said bottom electrode part is mounted is supported by said top surface. 
     
     
         10 . The optical module as claimed in  claim 1 , further comprising a rigid board on which parts other than said bottom electrode part are mounted, the rigid board having a penetrating opening or a notch part, wherein said flexible board is mounted on said rigid board so that said second surface is exposed in said penetrating hole or notch part, and said heat release member is arranged in a vicinity of said second surface of said flexible board through said penetrating opening or notch part. 
     
     
         11 . The optical module as claimed in  claim 1 , further comprising a rigid board on which parts other than said bottom electrode part are mounted, wherein an end of said flexible board is connected to said rigid board and said bottom electrode part is mounted on said end of said flexible board, and said flexible board is supported by said heat release member in a planar state. 
     
     
         12 . The optical module as claimed in  claim 1 , wherein said bottom electrode part is a device used for controlling or amplifying a light-emitting signal or a device used for amplifying a light-receiving signal.