Tips on how to design soft and hard composite boards ~ 22021/11/22

The combination of soft and hard board is a combination of soft board and hard board PCB Circuit board , In terms of design, it is very different from soft board design and hard board design , Today, jettoban pcb Xiaobian will introduce the knowledge about how to design the soft and hard combination board .

One 、 Line design requirements in flexible area :
1. Tear shape is adopted between thick line and thin line of the line , Prevent the line from suddenly expanding or shrinking ;
2. Use smooth corners , Avoid sharp corners .

Two ： When the electrical requirements are met , The pad shall be taken as the maximum value . The transition line at the junction of pad and conductor shall avoid right angles , Use smooth , The pad toe shall be added to the independent pad to strengthen the supporting effect .

3、 ... and 、 Dimensional stability : Design with copper as much as possible , The waste area shall be designed with as many solid copper berths as possible .

Four 、 Design of covering film window
1. Add manual alignment holes , Improve alignment accuracy .
2. The window design considers the scope of glue flow , Usually the window is larger than the original design , The specific size is determined by ME Provide design standards .
3. Small and dense windows can adopt special mold design ： Rotary punch 、 Jumping, etc .

5、 ... and 、 The design of rigid flex transition zone
1. Smooth transition of the line , The direction of the line shall be perpendicular to the bending direction ;
2. The conductor shall be evenly distributed throughout the bending area ;
3、 The conductor width shall be maximized throughout the bending zone , Try not to use in the transition zone PTH Design 、Coverlay And No flow PP The design of the .

6、 ... and 、 Yes air-gap Design of the required flexible zone
1. There shall be no through hole in the part to be bent .
2. Protective copper wires are added at the most two sides of the line , In case of insufficient space, you can use the inside of the bending part R Add protective copper wire at the corner .
3. The connecting part of the line shall be designed as an arc .
4、 Without affecting the assembly , The larger the bending area, the better .

7、 ... and 、 other
Do not share the tool hole of the flexible board , Such as punch hole 、 ET、 SMT Positioning holes, etc .

The above is the introduction of the relevant knowledge about how to design the soft and hard combination board , I hope it helped you . 

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