Flexible printed circuit board and electronic device
AssigneeCanon Kabushiki Kaisha
InventorShinsaku Watanabe
Life of this patent
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Abstract
A flexible printed circuit board having a copper foil character with good visibility and without copper foil pattern peeling. The flexible printed circuit board has a base material having optical transparency, a wiring pattern formed on one surface of the base material; a first opaque cover lay film covering a surface of the wiring pattern, a character formed on the other surface of the base material; and a second opaque cover lay film covering a surface of the character. The first opaque cover lay film has an opening portion is formed therein, and the character is formed so as to be visually recognizable through the opening portion.
Claims19
A flexible printed circuit board having a plurality of layers, the flexible printed circuit board comprising:
- a base material having optical transparency;
- a wiring pattern formed on one surface of the base material;
- a first opaque cover lay film covering a surface of the wiring pattern;
- a character formed on the other surface of the base material;
- and
- a second opaque cover lay film covering a surface of the character, wherein
- the first opaque cover lay film has an opening portion formed therein, and
- the character is formed so as to be visually recognizable through the opening portion.
A flexible printed circuit board having a plurality of layers, the flexible printed circuit board comprising:
- a first base material having optical transparency;
- a first wiring pattern formed on one surface of the first base material;
- a first opaque cover lay film covering the surface of the first wiring pattern;
- a second base material having optical transparency and disposed on the other surface of the first base material;
- a second wiring pattern formed between the other surface of the first base material and the one surface of the second base material;
- a character formed on the other surface of the second base material;
- and
- a second opaque cover lay film covering the surface of the character, wherein
- the first opaque cover lay film has an opening portion formed therein,
- the second wiring pattern is routed to avoid a region overlapping with the opening portion, and
- the character is formed so as to be visually recognizable through the opening portion.
A flexible printed circuit board having a plurality of layers, the flexible printed circuit board comprising:
- a first base material having optical transparency;
- a first wiring pattern formed on one surface of the first base material;
- a first opaque cover lay film covering the surface of the first wiring pattern;
- a second base material having optical transparency and disposed on the other surface of the first base material;
- a character formed between the other surface of the first base material and the one surface of the second base material;
- and
- a second opaque cover lay film covering the surface of the character, wherein
- the first opaque cover lay film has an opening portion formed therein, and
- the character is formed so as to be visually recognizable through the opening portion.
Dependencies are inferred from the claim text.