Application of ultraviolet laser processing in PCB manufacturing
For laser cutting or drilling in the
circuit board industry, only a few or more watts of ultraviolet (UV)
laser can be needed. In the application of consumer electronic products,
automobile industry or robot manufacturing technology, the use of flexible circuit boards
become increasingly important. With the advantages of flexibility and
high-precision processing effect, UV laser processing system has become
the first choice for flexible circuit board and thin PCB laser drilling
and cutting.
Figure 1: cutting slots by CO2 laser (left) VS UV laser (right).
The thermal effect of UV laser is small, and the cutting edge is clean and tidy.
UV laser is especially suitable for cutting and marking of rigid pcb board, rigid-flex pcb boards and the auxiliary materials. So what are the advantages of this laser process?
The UV laser cutting system shows great technical advantages in the areas such as the board divider of SMT industry and the micro-drill of PCB industry. If the accumulated laser pulse is lower than the laser pulse required to penetrate the material, only scratches will appear on the material surface; Therefore, the Qr code or barcode can be marked on the materials to track the information of the subsequent process.
Figure 2: multiple components of a substrate can be safely distributed even if it is close to the traces.
The pulse energy of UV laser only affects the microsecond time on the material, and there is no obvious thermal effect on a few micrometers beside the incision, so it is not necessary to consider the damage caused by the heat generated on the element. Lines and solder joints near the edges are intact and free of burrs.
Figure 3: an accurate profile can be formed on sensitive overlays by laser processing.
A similar process applies to the FPC overlays. The overlay is usually made of a polyimide with a thickness of 25um or 12.5um which is easily deformed. A single area (such as solder pad) does not need to be covered with film for later assembly, connection and other work.
This thin material is very sensitive to mechanical stresses –but can easily be done by the non-contact laser machining. At the same time, the vacuum adsorption table can fix its position and keep its flatness.
There are still more applications of the UV laser in the pcb manufacturing. As a professional high-end pcb manufacturer from China, Fastturnpcbs will try the best to widen the application of UV laser. If you have any idea about this,contact us from www.fastturnpcbs.com.
Figure 1: cutting slots by CO2 laser (left) VS UV laser (right).
The thermal effect of UV laser is small, and the cutting edge is clean and tidy.
UV laser is especially suitable for cutting and marking of rigid pcb board, rigid-flex pcb boards and the auxiliary materials. So what are the advantages of this laser process?
The UV laser cutting system shows great technical advantages in the areas such as the board divider of SMT industry and the micro-drill of PCB industry. If the accumulated laser pulse is lower than the laser pulse required to penetrate the material, only scratches will appear on the material surface; Therefore, the Qr code or barcode can be marked on the materials to track the information of the subsequent process.
Figure 2: multiple components of a substrate can be safely distributed even if it is close to the traces.
The pulse energy of UV laser only affects the microsecond time on the material, and there is no obvious thermal effect on a few micrometers beside the incision, so it is not necessary to consider the damage caused by the heat generated on the element. Lines and solder joints near the edges are intact and free of burrs.
Figure 3: an accurate profile can be formed on sensitive overlays by laser processing.
A similar process applies to the FPC overlays. The overlay is usually made of a polyimide with a thickness of 25um or 12.5um which is easily deformed. A single area (such as solder pad) does not need to be covered with film for later assembly, connection and other work.
This thin material is very sensitive to mechanical stresses –but can easily be done by the non-contact laser machining. At the same time, the vacuum adsorption table can fix its position and keep its flatness.
There are still more applications of the UV laser in the pcb manufacturing. As a professional high-end pcb manufacturer from China, Fastturnpcbs will try the best to widen the application of UV laser. If you have any idea about this,contact us from www.fastturnpcbs.com.
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