The core of the production of flexible boards is the "transformation" of flexible boards into rigid boards, and a common method is the use of trays.
To fix the FPC on the carrier board, two problems need to be solved:
Positioning problems.
The problem of fixing.
Currently, the flexible board is accurately affixed to the carrier board, the use of positioning tooling with positioning pins. It is similar to the tray, there are two positioning posts on it, before posting the flexible circuit board, the first tray set in the positioning tooling (the actual useful is the two positioning posts), posted, and then take away the positioning tray, just to play a temporary positioning role.
Flexible circuit board fixed, there are three main methods:
1. magnetic tray and cover plate (0.05mm thick stainless steel sheet).
Generally used for chip components are relatively large, not sensitive to the amount of solder paste, with the characteristics of low cost.
2. silicone paper (multiple reuse, generally can be used for 24h).
Is a more advanced process method, patch surface flat, but at present can provide sources of manufacturers are not many, only Korea and Japan have two. General tray where the paste silicone under the digging a tape thickness to ensure that the flexible circuit patch surface flat.
3. High temperature tape (high temperature resistance, no residual adhesive).
Because each time you need to paste tear operation, so it is more troublesome, laborious and time-consuming.
There is also a matter of principle: flexible circuit patch placed in the manufacturer or their own use of the pick and place machine, which production is better? From the production efficiency, quality considerations, in the board factory to be good. Reasons.
1. Can save the middle of the packaging.
2. in the way of patch production, high efficiency.
Own production, generally accepted as a single circuit board, the production needs to be placed and taken down one by one, very troublesome. If the production of the collocation method, you need to purchase a punching machine, design and make special molds.
