Glass fiber resin composite substrate melting and cutting method

Abstract

The invention discloses a melting and cutting method for a glass fiber resin composite substrate, and relates to the technical field of resin-based PCB (Printed Circuit Board) processing. The method comprises the following steps: S100, preparing a glass fiber resin composite board with a built-in auxiliary boundary; s200, clamping and covering a plurality of cooling plates on the upper surface and the lower surface of the glass fiber resin composite plate, wherein a gap between the adjacent cooling plates is arranged right above the built-in auxiliary boundary; s300, additionally arranging light gathering blocks between the adjacent cooling plates; s400, a laser cutting machine is used for cutting the glass fiber resin composite board along the built-in auxiliary boundary by aiming at the light condensation block; the problem that a large amount of floating dust is generated in the mechanical cutting process of an existing glass fiber resin composite substrate is solved.

Description

Technical Field

[0001] The invention relates to the technical field of resin-based PCB board processing, in particular to a method for melting and cutting a glass fiber resin composite substrate. Background Art

[0002] Glass fiber resin composite substrate is a material widely used in PCB (printed circuit board), which is mainly composed of glass fiber cloth and resin (such as epoxy resin, polyimide resin, etc.). This substrate has excellent mechanical strength, electrical insulation performance, heat resistance and dimensional stability, which can meet the stringent requirements of most electronic devices.

[0003] Glass fiber cloth acts as a reinforcement material, providing the skeleton structure of the substrate, while the resin acts as a binder to bind the glass fiber cloth to other laminate materials. Common types of glass fiber cloth include electronic grade glass cloth (E-Glass), which is widely used in substrates such as FR-4 due to its excellent dielectric properties.

[0004] FR-4 is the most common fiberglass resin composite substrate material, which is made of glass fiber cloth impregnated with epoxy resin and has flame retardancy, high strength, chemical corrosion resistance and good electrical insulation properties. This material occupies a dominant position in electronic products such as computer motherboards, mobile phone motherboards, industrial control boards, etc.

[0005] In addition to FR-4, there are other types of glass fiber substrates, such as the CEM series (e.g. CEM-1 and CEM-3). These materials improve the mechanical strength, moisture resistance and electrical performance by improving the number of glass fiber cloth layers and resin formulation, and are suitable for high-frequency characteristic PCBs.

[0006] Glass fiber resin composite substrate has become an indispensable material in PCB manufacturing due to its excellent comprehensive properties. It is widely used in various electronic devices, especially in areas requiring high reliability and high performance.

[0007] For FR-4 substrates, mechanical cutting is generally used during cutting. This will generate a lot of floating dust during the cutting process, causing pollution in the workshop and not conducive to dust-free processing of the board. For FR-4 substrates using glass fiber cloth, if laser melting cutting is used, although dust-free cutting can be achieved, due to the setting of glass fiber cloth, there are many burrs on the edges of the collection after cutting, and more floating dust will be generated when grinding again. Summary of the invention

[0008] The object of the present invention is to provide a method for melting and cutting a glass fiber resin composite substrate, so as to solve the problem that a large amount of floating dust is generated in the process of mechanical cutting of the existing glass fiber resin composite substrate.

[0009] In order to solve the above problems, the present invention adopts the following technical means: A method for melting and cutting a glass fiber resin composite substrate comprises the following steps: S100. Preparing a fiberglass resin composite panel having a built-in auxiliary boundary; S200. Multiple cooling plates are clamped and covered on the upper and lower surfaces of the glass fiber resin composite plate, and the gap between adjacent cooling plates is set directly above the built-in auxiliary boundary; S300. Install a focusing block between adjacent cooling plates; S400. Use a laser cutting machine to align the focusing block and cut the glass fiber resin composite board along the built-in auxiliary boundary.

[0010] Preferably, the step S100 includes: S110. Cutting the fiberglass cloth according to the finished product boundary to form an auxiliary boundary; S120. Impregnating a glass fiber cloth having a plurality of auxiliary boundaries in epoxy resin; S130. Curing the glass fiber cloth impregnated with epoxy resin in a vacuum environment to obtain a glass fiber resin composite board with a built-in auxiliary boundary.

[0011] Furthermore, the auxiliary boundary is arranged around the boundary of the finished product, and the auxiliary boundary is arranged discontinuously.

[0012] Furthermore, in step S200, the cooling plate is a metal plate having a water cooling cavity.

[0013] Furthermore, in step S300, the focusing block is a quartz glass light-transmitting block, and the surface of the quartz glass light-transmitting block facing the cooling plate is covered with a reflective coating.

[0014] Furthermore, in the step S400, laser cutting is performed twice, the first cutting power is 10-15W, and the second cutting power is 20-25W.

[0015] The present invention has the following beneficial effects during application: By using the built-in auxiliary boundary, the edge of the finished product after cutting can be outlined in the glass fiber resin composite board with the built-in auxiliary boundary, and there is no glass fiber at the built-in auxiliary convenient position. When using laser cutting, only the epoxy resin can be cut directly, effectively avoiding the incomplete ablation of the glass fiber. Moreover, combined with the cooling plate and the focusing block, it can avoid the scattering of the cutting laser light to the greatest extent, and avoid the slow heat conduction of the resin substrate, which causes the laser cutting surface to aggregate and appear uneven. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0017] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0019] Example 1 A method for melting and cutting a glass fiber resin composite substrate comprises the following steps: S100. Preparing a fiberglass resin composite panel having a built-in auxiliary boundary; S200. Multiple cooling plates are clamped and covered on the upper and lower surfaces of the glass fiber resin composite plate, and the gap between adjacent cooling plates is set directly above the built-in auxiliary boundary; S300. Install a focusing block between adjacent cooling plates; S400. Use a laser cutting machine to align the focusing block and cut the glass fiber resin composite board along the built-in auxiliary boundary.

[0020] Preferably, the step S100 includes: S110. Cutting the fiberglass cloth according to the finished product boundary to form an auxiliary boundary; S120. Impregnating a glass fiber cloth having a plurality of auxiliary boundaries in epoxy resin; S130. Curing the glass fiber cloth impregnated with epoxy resin in a vacuum environment to obtain a glass fiber resin composite board with a built-in auxiliary boundary.

[0021] Furthermore, the auxiliary boundary is arranged around the boundary of the finished product, and the auxiliary boundary is arranged discontinuously.

[0022] In this way, only a small part of the glass fiber with burrs needs to be polished in the later stage.

[0023] Furthermore, in step S200, the cooling plate is a metal plate having a water cooling cavity.

[0024] Furthermore, in step S300, the focusing block is a quartz glass light-transmitting block, and the surface of the quartz glass light-transmitting block facing the cooling plate is covered with a reflective coating.

[0025] Furthermore, in the step S400, laser cutting is performed twice, the first cutting power is 10W, and the second cutting power is 20W.

[0026] The present invention has the following beneficial effects during application: By using the built-in auxiliary boundary, the edge of the finished product after cutting can be outlined in the glass fiber resin composite board with the built-in auxiliary boundary, and there is no glass fiber at the built-in auxiliary convenient position. When using laser cutting, only the epoxy resin can be cut directly, effectively avoiding the incomplete ablation of the glass fiber. Moreover, combined with the cooling plate and the focusing block, it can avoid the scattering of the cutting laser light to the greatest extent, and avoid the slow heat conduction of the resin substrate, which causes the laser cutting surface to aggregate and appear uneven.

[0027] Example 2 A method for melting and cutting a glass fiber resin composite substrate comprises the following steps: S100. Preparing a fiberglass resin composite panel having a built-in auxiliary boundary; S200. Multiple cooling plates are clamped and covered on the upper and lower surfaces of the glass fiber resin composite plate, and the gap between adjacent cooling plates is set directly above the built-in auxiliary boundary; S300. Install a focusing block between adjacent cooling plates; S400. Use a laser cutting machine to align the focusing block and cut the glass fiber resin composite board along the built-in auxiliary boundary.

[0028] Preferably, the step S100 includes: S110. Cutting the fiberglass cloth according to the finished product boundary to form an auxiliary boundary; S120. Impregnating a glass fiber cloth having a plurality of auxiliary boundaries in epoxy resin; S130. Curing the glass fiber cloth impregnated with epoxy resin in a vacuum environment to obtain a glass fiber resin composite board with a built-in auxiliary boundary.

[0029] Furthermore, the auxiliary boundary is arranged around the boundary of the finished product, and the auxiliary boundary is arranged discontinuously.

[0030] Furthermore, in step S200, the cooling plate is a metal plate having a water cooling cavity.

[0031] Furthermore, in step S300, the focusing block is a quartz glass light-transmitting block, and the surface of the quartz glass light-transmitting block facing the cooling plate is covered with a reflective coating.

[0032] Furthermore, in the step S400, laser cutting is performed twice, the first cutting power is 13W, and the second cutting power is 22W.

[0033] The present invention has the following beneficial effects during application: By using the built-in auxiliary boundary, the edge of the finished product after cutting can be outlined in the glass fiber resin composite board with the built-in auxiliary boundary, and there is no glass fiber at the built-in auxiliary convenient position. When using laser cutting, only the epoxy resin can be cut directly, effectively avoiding the incomplete ablation of the glass fiber. Moreover, combined with the cooling plate and the focusing block, it can avoid the scattering of the cutting laser light to the greatest extent, and avoid the slow heat conduction of the resin substrate, which causes the laser cutting surface to aggregate and appear uneven.

[0034] Example 3 A method for melting and cutting a glass fiber resin composite substrate comprises the following steps: S100. Preparing a fiberglass resin composite panel having a built-in auxiliary boundary; S200. Multiple cooling plates are clamped and covered on the upper and lower surfaces of the glass fiber resin composite plate, and the gap between adjacent cooling plates is set directly above the built-in auxiliary boundary; S300. Install a focusing block between adjacent cooling plates; S400. Use a laser cutting machine to align the focusing block and cut the glass fiber resin composite board along the built-in auxiliary boundary.

[0035] Preferably, the step S100 includes: S110. Cutting the fiberglass cloth according to the finished product boundary to form an auxiliary boundary; S120. Impregnating a glass fiber cloth having a plurality of auxiliary boundaries in epoxy resin; S130. Curing the glass fiber cloth impregnated with epoxy resin in a vacuum environment to obtain a glass fiber resin composite board with a built-in auxiliary boundary.

[0036] Furthermore, the auxiliary boundary is arranged around the boundary of the finished product, and the auxiliary boundary is arranged discontinuously.

[0037] Furthermore, in step S200, the cooling plate is a metal plate having a water cooling cavity.

[0038] Furthermore, in step S300, the focusing block is a quartz glass light-transmitting block, and the surface of the quartz glass light-transmitting block facing the cooling plate is covered with a reflective coating.

[0039] Furthermore, in the step S400, laser cutting is performed twice, the first cutting power is 15W, and the second cutting power is 25W.

[0040] The present invention has the following beneficial effects during application: By using the built-in auxiliary boundary, the edge of the finished product after cutting can be outlined in the glass fiber resin composite board with the built-in auxiliary boundary, and there is no glass fiber at the built-in auxiliary convenient position. When using laser cutting, only the epoxy resin can be cut directly, effectively avoiding the incomplete ablation of the glass fiber. Moreover, combined with the cooling plate and the focusing block, it can avoid the scattering of the cutting laser light to the greatest extent, and avoid the slow heat conduction of the resin substrate, which causes the laser cutting surface to aggregate and appear uneven.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for melting and cutting a glass fiber resin composite substrate, characterized in that: The following steps are involved: S100. Preparing a fiberglass resin composite panel having a built-in auxiliary boundary; S200. Multiple cooling plates are clamped and covered on the upper and lower surfaces of the glass fiber resin composite plate, and the gap between adjacent cooling plates is set directly above the built-in auxiliary boundary; S300. Install a focusing block between adjacent cooling plates; S400. Use a laser cutting machine to align the focusing block and cut the glass fiber resin composite board along the built-in auxiliary boundary.

2. A method for melting and cutting glass fiber resin composite substrates according to claim 1, characterized in that: The step S100 includes: S110. Cutting the fiberglass cloth according to the finished product boundary to form an auxiliary boundary; S120. Impregnating a glass fiber cloth having a plurality of auxiliary boundaries in epoxy resin; S130. Curing the glass fiber cloth impregnated with epoxy resin in a vacuum environment to obtain a glass fiber resin composite board with a built-in auxiliary boundary.

3. A method for melting and cutting glass fiber resin composite substrates according to claim 2, characterized in that: The auxiliary border is arranged around the finished product border, and the auxiliary border is arranged discontinuously.

4. A method for melting and cutting a glass fiber resin composite substrate according to claim 1, characterized in that: In the step S200, the cooling plate is a metal plate having a water cooling cavity.

5. The method for melting and cutting a glass fiber resin composite substrate according to claim 1, characterized in that: In the step S300, the focusing block is a quartz glass light-transmitting block, and the surface of the quartz glass light-transmitting block facing the cooling plate is covered with a reflective coating.

6. A method for melting and cutting a glass fiber resin composite substrate according to claim 1, characterized in that: In the step S400, laser cutting is performed twice, the first cutting power is 10-15W, and the second cutting power is 20-25W.