FPC flex electronic circuit board related terms(one)
FPC is a flexible electronic circuit board. The flexible circuit board is made of polyimide or polyester film and is a highly reliable and excellent flexible printed circuit board. Referred to as soft board or FPC, it has the characteristics of high wiring density, light weight and thin thickness.
FPC is mainly used in mobile phones, notebook computers, PDAs, digital cameras, LCM and many other products. Here are some common terms related to FPC.
1. Access Hole exposes the hole (through the exposed hole, the exposed hole)
It is often referred to as the protective layer of the outer surface of the flex board Coverlay (through the exposed hole), used to adhere to the surface of the soft board as a solder mask. However, it is necessary to deliberately expose the hole ring wall or square pad required for welding to facilitate the welding of the parts. The so-called "Access Hole" text means that the surface has a hole to expose, so that the outside world can "close" to the surface of the surface of the surface of the surface of the solder joint. Some multilayer boards also have such exposed holes.
2. Acrylic Acrylic
It is a common name for polyacrylic resins. Most of the soft boards use their films as the next film.
3. Adhesive glue or adhesive
A substance that allows the two interfaces to bond, such as a resin or paint.
4. Anchoring Spurs
In the middle plate or single panel, in order to make the hole ring pad have stronger adhesive property on the plate surface, a few finger claws may be added on the excess open space outside the hole ring to make the hole ring more Consolidate to reduce the possibility of floating off the board.
5. Bandability bending, bending ability
A soft board that is a feature of Dynamic Flex Board, such as the print heads of a computer disk drive, should have a "bend test" of one billion times.
6. Bonding Layer bonding layer, then layer
It is often referred to as a film layer of a multi-layer board, or a TAB tape, or a board of a soft board, an adhesive layer between the copper skin and a polyimide substrate.
7.Coverlay/Cover Coat cover layer, protective layer
The outer layer of the soft board is not easily soldered with the green paint used for the hard board, and may fall off when bent. It is necessary to use a soft "acrylic" laminate on the board surface, which can be used as a solder mask and protect the outer layer, and enhance the resistance and durability of the soft board. The outer membrane is called a sheath or a protective layer.
8.Dynamic Flex (FPC) dynamic soft board
It is refers to a flexible circuit board that needs to be used for continuous motion, such as a soft board in a disk drive read/write head. In addition, "Static FPC" refers to a soft board that no longer operates when assembled properly.