Double-sided FPC soft board
Product description
FPC soft board is a highly reliable and excellent flexible printed circuit board made of polyester film or polyimide. It is light in weight, thin in thickness, and can be bent and folded freely. Popular for its features.
The product in the picture is a double-sided FPC soft board with FR4 reinforcement and 3M adhesive tape. This product is used in the field of credit card machines and mainly plays a shielding role.
The basic parameters are as follows:
2-layer soft board plus 0.6mmFR-4 reinforcement 6 plus 3M glue (3M9077)
Material: Shengyi 18\/25\/18 double-sided adhesive-free ED base material plus 12.5\/25 yellow covering film
Surface treatment: ENIG 0.05umAu
Soft board thickness=0.17 plus\/-0.03mm
Single size:9587.04mm
Line width\/line spacing: 5\/5mil, maze loop line
The specific stacking structure is as follows:
| 50um | 3M9077 | |
| 600um | FR4 | |
| 25um | Adhesive | |
| 13um | Coverlay(yellow) | |
| 25um | Coverlay Adhesive | |
| Layer 1 | 35um | Base Copper |
| 25um | Polyimide(Adhesiveless) | |
| Layer 2 | 35um | Base Copper |
| 25um | Coverlay Adhesive | |
| 13um | Coverlay(yellow) |
FPC soft board thickness: 170 plus\/-30um
FPC soft board plus FR4 reinforcement thickness: 800 plus\/-80um
3M glue plus FPC soft board plus FR4 reinforcement thickness: 850 plus\/-90um
The difficulty in producing this type of FPC soft board lies in the labyrinth loop circuit of the entire board, which is easily scrapped due to short circuit during production.
FR4 has a lot of reinforcements, with 6 places. Problems such as lack of reinforcements and reinforcement offsets are prone to occur during production. When producing this type of FPC soft board, it is also a key item of quality control.
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