Talking about PCB grinding brush roller

The grinding brush roller used in PCB manufacturing can be divided into two categories according to its functions, namely grinding brush roller and cleaning brush roller, while the grinding brush roller accounts for the majority. The cleaning brush roller is only used for later cleaning of finished products or later cleaning after grinding, and the quantity is relatively small, so it is collectively called grinding brush roller.
According to the material used, the grinding brush roller can be divided into three categories: nylon needle brush roller, non-woven brush roller and ceramic brush roller. They have their own characteristics in use.
Nylon needle brush roller has a long history as the brush roller used earlier in PCB manufacturing industry. According to different manufacturing processes, it can be divided into five types: steel belt winding type, woven type, slotted embedded type, round hole embedded type and rubber plate embedded type. The nylon needle brush produced by our company adopts three manufacturing processes: steel belt winding, weaving and round hole embedded. These three processes can ensure the wire density of nylon needle brush wire and control the uniformity of nylon needle brush wire, so they can completely meet the different needs of various customers.
Nylon needle brush roller can be divided into silicon carbide (SIC) abrasive, alumina (AO) abrasive and pure nylon according to the different abrasive content of nylon needle brush wire. The particle size distribution range of both carbide and alumina (AO) abrasive is: 60 #, 80 #, 100 #, 120 #, 150 #, 180 #, 240 #, 320 #, 400 #, 500 #, 600 #, 800 #, 1000 #, 1200 #, 1500 #. Nylon needle brush roller is characterized by long service life and moderate grinding effect, especially suitable for surface treatment during PCB manufacturing under the condition of line width/line spacing (L/S) ≥ 200um (=8mil) and copper foil thickness ≤ 35um. It played an important role in the early PCB manufacturing industry.
However, with the recent requirements of PCB users for more and more fine line width/line spacing (L/S), the unique scratches of nylon needle brush are relatively serious, and the impact force on the line is large, which is very easy to cause defects such as microfilament bridging and wire breakage. Pure nylon needle brush roller without abrasive, such as pozzolanic brush roller or pumice brush roller, can be completely used for grinding thin lines such as 75um-150um (3-6mi) line width PCB due to the selection of nylon needle brush wire and the improvement of equipment.
Non-woven brush roller is a kind of brush roller selected later by the PCB manufacturing industry. According to different manufacturing processes, it can be divided into three types: Flap type, Disk type and Sponge type. GSH brand non-woven brush roller adopts the first two manufacturing structures, namely, Flap type and Disk type. Due to the different matching of materials, density and processing technology, it can meet the different needs of various customers.
Non-woven cloth brush roller can be divided into silicon carbide (SIC) abrasive, alumina (AO) abrasive and pure non-woven cloth according to the different abrasive content of non-woven cloth. The particle size distribution range of both silicon carbide (SIC) and alumina (AO) abrasives is: 60 #, 80 #, 100 #, 120 #, 150 #, 180 #, 240 #, 320 #, 400 #, 500 #, 600 #, 800 #, 1000 #, 1200 #, 1500 #. The non-woven brush roller is characterized by fine grinding and uniform surface roughness, which can significantly improve the adhesion of photosensitive film and green oil film
It is not applicable to the manufacturing of PCBs with line width/line spacing (L/S) ≤ 100um (=4mil) and copper foil thickness ≤ 35um. It has outstanding performance in the fields of burr removal after drilling, photosensitive film pretreatment and green oil (anti-oxidation) pretreatment.
In particular, the introduction of green oil (anti-oxidation) pretreatment process has proved that it will improve the yield or reduce the short circuit, open circuit and electrical test NG10% - 15%, which still needs to be concerned about the industry friends
Go for further verification.
The disadvantage of non-woven brush roller is its short service life and high grinding cost. However, if we consider the improvement of product yield, I believe that industry friends will have their own
Conclude!