Printed circuit board and camera module
View Patent ↗A printed circuit board has a flexible portion where a covering layer is exposed, and a rigid portion provided by forming a resistant layer on a part of the covering layer. To produce a camera module, a lens unit and a CCD are affixed to the printed circuit board through an adhesive, wherein the CCD is located inside the lens unit. The rigid portion has a top surface that is substantially equal in shape and size to an outline of a bottom surface of the lens unit, so the top surface of the rigid portion serves as a coating area for the adhesive.
1. A printed circuit board comprising:
a number of layers including a wiring layer formed with a circuit pattern and a covering layer covering said wiring layer,
wherein at least a separate component may be affixed to said printed circuit board through an adhesive that is put on a designated coating area in a surface of said printed circuit board, and said coating area is marked by a differentiated layer structure at least in a border of said coating area; and
a resistant layer formed to cover a part of said covering layer, said resistant layer being rigid and substantially equal in shape and size to said coating area, to mark said coating area as a rigid portion, whereas other portions exposing said covering layer are flexible,
wherein said resistant layer is made of a material having a different color from other layers.
2. A printed circuit board comprising a number of layers including a wiring layer formed with a circuit pattern and a covering layer covering said wiring layer,
wherein at least a separate component may be affixed to said printed circuit board through an adhesive that is put on a designated coating area in a surface of said printed circuit board, and said coating area is marked by a differentiated layer structure at least in a border of said coating area, and
wherein said coating area is marked with perforations which are formed through at least one of said layers.
3. A printed circuit board as claimed in claim 1 , wherein said perforations are arranged along the border of said coating area.
4. A printed circuit board as claimed in claim 1 , wherein said perforations are formed through an outermost one of said layers.
5. A printed circuit board as claimed in claim 4 , wherein said outermost layer is made of a material having a different color from other layers.
6. A printed circuit board as claimed in claim 1 , further comprising a resistant layer formed to cover a part of said covering layer.
7. A printed circuit board as claimed in claim 6 , wherein said perforations are arranged along the border of said coating area.
8. A printed circuit board as claimed in claim 6 , wherein said perforations are formed through said resistant layer, and said resistant layer is made of a material having a different color from other layers.