Pressing device for improving OSP color of IC carrier pad window and OSP line

Abstract

The invention discloses a pressing device for improving the OSP color of an IC carrier plate bonding pad window and an OSP line, the pressing device is applied to sponge rollers of the OSP line, and each group of sponge rollers is divided into a driving roller at the lower part and a driven roller at the upper part; comprising a beam, supporting rods, pressing blocks and springs. A plurality of guide holes are formed in the cross beam at intervals, and the cross beam is fixedly mounted on an external main rod; the support rod is slidably connected in the guide hole; the pressing block is fixed at the bottom of the strut; an arc-shaped groove is formed in the bottom of the pressing block and attached to the upper portion of a rolling shaft of the driven roller. The spring sleeves the supporting rod in a compressed state and is positioned between the pressing block and the cross beam; under the action of the spring, the pressing block downwards extrudes the driven roller at the upper part at a set pressure; the driven roller is made to be attached to the surface of the workpiece with a certain pressure, the sponge of the driven roller extrudes the liquid medicine into a gap between workpiece resistance welding, it is ensured that the liquid medicine covers the copper face at the windowing position, and OSP liquid medicine exchange between small bonding pads is improved.

Description

Technical Field

[0001] This invention relates to the field of flux removal and reflow soldering fixtures, specifically to a lamination device and OSP line for improving the color matching of OSP (Optical Solder Parts) pads on IC substrates. Background Technology

[0002] The pads of FC-CSP (Flip-Chip Chip-Scale Package) products are becoming smaller and denser. As the pad design becomes smaller and the opening size approaches 50μm, a certain height difference is formed between the copper surface and the solder mask. In addition, factors such as the characteristics of the flux and the surface tension of the product make it difficult for the OSP (Organic Solderability Preservative) flux under immersion treatment to penetrate into the small-diameter pads. This makes it easy for problems such as discoloration and poor film application to occur in this type of design. Summary of the Invention

[0003] To address the aforementioned deficiencies in existing technologies, a pressing device and OSP line for improving the color matching of OSP on IC carrier board pads are provided. A certain pressure is applied between the sponge rollers to squeeze the solution between the pads, thereby improving the exchange of OSP solution between small pads.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: Firstly, an improved pressing device for OSP color-changing IC carrier board pad opening is applied to the sponge rollers in the OSP line. Each set of sponge rollers is divided into a lower drive roller and an upper driven roller. include The crossbeam has multiple guide holes spaced apart, and the crossbeam is fixedly installed on the external main rod. The support rod is slidably connected within the guide hole; The pressure block is fixed to the bottom of the support rod; an arc-shaped groove is provided at the bottom of the pressure block, and the arc-shaped groove fits against the upper part of the driven roller's shaft; The spring is fitted onto the support rod in a compressed state and is located between the pressure block and the crossbeam; under the action of the spring, the pressure block presses down on the upper driven roller with a set pressure.

[0005] According to the above technical solution, the fixed position of the crossbeam on the main rod is adjustable.

[0006] According to the above technical solution, it also includes a wing nut, which has an external thread on the main rod and a U-shaped limiting groove on the crossbeam; the height of the wing nut on the main rod is adjusted, and the wing nut is placed in the U-shaped limiting groove to restrict the crossbeam from sliding upward along the main rod.

[0007] According to the above technical solution, the U-shaped limiting groove is an open groove structure, including an outer section and an inner section. The size of the outer section is larger than the cross-sectional size of the main rod and smaller than the cross-sectional size of the part of the wing nut placed in the U-shaped limiting groove. The size of the outer section is larger than the cross-sectional size of the part of the wing nut placed in the U-shaped limiting groove and smaller than the cross-sectional size of the part of the wing nut not placed in the U-shaped limiting groove.

[0008] According to the above technical solution, the wing nut includes a lower cylindrical section and an upper wing-shaped section. A threaded hole is provided on the wing nut, running from top to bottom through the cylindrical section and the wing-shaped section. The cross-sectional dimensions of the cylindrical section match the cross-sectional dimensions of the inner section of the U-shaped limiting groove.

[0009] According to the above technical solution, the number of U-shaped limiting grooves is the same as the vertical direction of the main rod; on the crossbeam, several guide holes and several U-shaped limiting grooves are staggered and located on the same straight line.

[0010] According to the above technical solution, a linear drive unit is provided on the external equipment platform for adjusting the position of the crossbeam on the main rod; one end of the linear drive unit is fixed on the external equipment platform, and the other end is fixed on the crossbeam; the linear drive unit drives the crossbeam to slide on the main rod; the linear drive unit is driven by a motor and driven by a lead screw and nut; the nut is fixed on the crossbeam; the lead screw is rotatably connected to the external equipment platform and is driven by the motor to rotate on its own.

[0011] According to the above technical solution, a limiting block is fixedly installed at the top of the support rod.

[0012] Secondly, the OSP line, along the production line transport direction, is equipped with a pressing device, as described above, to improve the OSP color matching of IC carrier board pad opening.

[0013] According to the above technical solution, it also includes a machine base, a main rod, a drive unit, a gear transmission unit, and multiple sets of sponge rollers spaced apart on the machine base; the main rod is fixed on the machine base, and the pressing device is fixed on the main rod; The equipment platform has multiple mounting slots, each containing a retaining clip that is detachably fixed within the slot. The mounting slots are divided into a lower rotating shaft hole and an upper rotating semicircular hole. Each set of sponge rollers includes a lower driving roller and an upper driven roller, with rollers at their ends. The gear transmission unit includes a driving gear and a driven gear. The driving gear is fixed to the roller of the driving roller, and the driven gear is fixed to the roller of the driven roller. The roller of the driving roller is placed in the lower rotating shaft hole and connected to the driving unit. The roller of the driven roller is placed in the upper rotating semicircular hole, and the driven gear meshes with the driving gear under gravity. The pressure block presses against the roller of the driven roller.

[0014] The present invention has the following beneficial effects: 1. The pressing device presses against the roller of the driven roller at a set pressure. The pressing device applies downward pressure to the driven roller, so that the driven roller presses against the surface of the workpiece at a certain pressure. The sponge of the driven roller squeezes the flux into the gap between the workpiece solder resists, ensuring that the flux covers the copper surface at the opening and improving the exchange of OSP flux between small solder pads.

[0015] 2. The spring is placed between the crossbeam and the pressure block. Under the action of the compressed spring, the pressure block is pressed against the upper surface of the driven roller shaft by the spring. When the size of the plate between the driven roller and the drive roller is too large, the plate can lift the driven roller, ensuring that the driven roller has a certain springback characteristic and avoiding plate jamming between the plates.

[0016] 3. The fixed position of the crossbeam on the main rod is made adjustable. The height of the crossbeam on the main rod is adjusted using a wing nut or a linear drive unit, indirectly regulating the elastic potential energy of the spring and thus controlling the pressure applied to the driven roller, facilitating quantitative management. Furthermore, two methods for adjusting the crossbeam height are provided to meet the needs of different scenarios and improve the versatility of this pressing device.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0019] Figure 1 This is a usage state diagram of an embodiment provided by the present invention; Figure 2 This is a schematic diagram of the structure of the sponge roller provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the pressing device provided in an embodiment of the present invention; Figure 4 This is a front view of the pressing device provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the crossbeam of the pressing device provided in an embodiment of the present invention; In the diagram, 1. Pressing device; 1-1. Crossbeam; 1-2. Support rod; 1-3. Pressing block; 1-4. Spring; 1-5. Butterfly nut; 1-6. U-shaped limiting groove; 2. Equipment platform; 3. Main rod; 4. Sponge roller; 4-1. Drive roller; 4-2. Driven roller; 4-3. Roller; 5. Mounting groove; 5-1. Lower rotating shaft hole; 5-2. Upper rotating semi-circular hole; 6. Clamping device. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-5 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0021] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example 1 Reference Figures 1-2 As shown, the OSP line provided by the present invention has a pressing device 1 on the production line to improve the color difference of OSP opening of IC carrier board pads along the production line transport direction.

[0024] The OSP line also includes a machine platform 2, a main rod 3, a drive unit, a gear transmission unit, and multiple sets of sponge rollers 4 spaced apart on the machine platform; the main rod is fixed on the machine platform, and the pressing device is fixed on the main rod.

[0025] The equipment platform is provided with multiple mounting slots 5, and each mounting slot is provided with a clamp 6. The clamp is detachably fixed in the mounting slot, which divides the mounting slot into a lower rotating shaft hole 5-1 and an upper rotating semi-circular hole 5-2. Each set of sponge rollers includes a driving roller 4-1 located at the bottom and a driven roller 4-2 located at the top. The ends of the driving roller and the driven roller are provided with rollers 4-3. The gear transmission unit includes a driving tooth and a driven tooth. The driving tooth is fixed on the roller of the driving roller, and the driven tooth is fixed on the roller of the driven roller. The roller of the driving roller is placed in the lower rotating shaft hole and connected to the driving unit. The roller of the driven roller is placed in the upper rotating semi-circular hole, and the driven tooth meshes with the driving tooth under the action of gravity. The pressure block presses on the roller of the driven roller.

[0026] In the OPS line, multiple mounting slots are spaced apart on both sides of the equipment along the conveying direction. After the drive roller's shaft is placed in the mounting slot, a clamp is installed inside the slot. The lower rotating shaft hole formed by the clamp and the mounting slot restricts the drive roller to only rotate on the machine. Then, the driven roller's shaft is placed in the upper rotating semi-circular hole formed by the clamp. At this point, the driven gear on the driven roller's shaft and the driving gear on the drive roller's shaft mesh with each other under the influence of gravity; as the drive assembly drives the drive roller to rotate, it also drives the driven roller to rotate.

[0027] The pressing device applies a set pressure to the driven roller. The pressing device applies downward pressure to the driven roller, causing it to adhere to the surface of the workpiece under certain pressure. The sponge of the driven roller squeezes the flux into the gap between the workpiece solder resists, ensuring that the flux covers the copper surface at the opening and improving the exchange of OSP flux between small solder pads.

[0028] Example 2 Reference Figure 1 , Figures 3-5 As shown, the pressing device for improving the color matching of OSP (Optical Substrate Patch) pads on IC carrier boards provided in this application is used in the sponge rollers of the OSP line. Each set of sponge rollers is divided into a lower drive roller and an upper driven roller; the pressing device includes... The crossbeam 1-1 has multiple guide holes spaced apart, and the crossbeam is fixedly installed on the external main rod; Support rod 1-2, multiple support rods are slidably connected in the guide hole; Pressure blocks 1-3 are fixed to the bottom of the support rod; an arc-shaped groove is provided at the bottom of the pressure block, and the arc-shaped groove fits against the upper part of the driven roller shaft; Springs 1-4 are fitted onto the support rod in a compressed state and are located between the pressure block and the crossbeam; under the action of the springs, the pressure block presses the upper driven roller downward with a set pressure.

[0029] Multiple support rods are set on the crossbeam, and each support rod corresponds to a set of sponge rollers, so that pressure can be applied to the driven rollers of multiple sets of adjacent sponge rollers.

[0030] The spring is placed between the crossbeam and the pressure block. Under the action of the compressed spring, the pressure block is pressed against the upper surface of the driven roller shaft by the spring. When the size of the plate between the driven roller and the drive roller is too large, the plate can lift the driven roller, ensuring that the driven roller has a certain springback characteristic and avoiding plate jamming.

[0031] Example 3 Based on Embodiment 2, the fixed position of the crossbeam on the main rod is adjustable in order to adjust the pressure applied to the driven roller. This application provides two adjustment methods: manual adjustment and automatic adjustment.

[0032] The first manual adjustment method is as follows (as shown in the figure): The pressing device also includes wing nuts 1-5, which have external threads on the main rod and U-shaped limiting grooves 1-6 on the crossbeam. Adjusting the height of the wing nuts on the main rod, the wing nuts are positioned within the U-shaped limiting grooves, restricting the crossbeam from sliding upwards along the main rod. In this application, the wing nuts are fixed to the main rod, serving as the upper limit for the crossbeam to slide upwards on the main rod; the pressure block adheres to the roller of the driven roller, preventing the pressure block and support rod from moving downwards; and the spring located between the pressure block and the crossbeam serves as the lower limit for the crossbeam to slide downwards on the main rod.

[0033] In embodiment 3, a preferred structural form of U-shaped limiting groove and wing nut is given. The U-shaped limiting groove is an open groove structure, including an outer section and an inner section. The size of the outer section is larger than the cross-sectional size of the main rod and smaller than the cross-sectional size of the portion of the wing nut placed in the U-shaped limiting groove. The size of the outer section is larger than the cross-sectional size of the portion of the wing nut placed in the U-shaped limiting groove and smaller than the cross-sectional size of the portion of the wing nut not placed in the U-shaped limiting groove.

[0034] Due to the aforementioned dimensions, the main rod can slide from the outer section of the U-shaped limiting groove into the inner section. After the wing nut is fixed on the main rod, the wing nut is fixed on the main rod, and the area where the wing nut is fixed cannot slide from the inner section of the U-shaped limiting groove to the outer section, thus preventing the main rod from detaching from the U-shaped limiting groove.

[0035] The wing nut comprises a lower cylindrical section and an upper wing-shaped section. A threaded hole runs from top to bottom through both the cylindrical and wing-shaped sections. The cross-sectional dimensions of the cylindrical section match the cross-sectional dimensions of the inner section of the U-shaped limiting groove. When the cylindrical section of the wing nut is positioned on the outer side of the U-shaped limiting groove, it effectively prevents the main rod from sliding out of the U-shaped limiting groove.

[0036] In embodiment 3, the number of U-shaped limiting grooves is the same as the vertical direction of the main rod; on the crossbeam, several guide holes and several U-shaped limiting grooves are arranged alternately and are located on the same straight line.

[0037] The second type of automatic adjustment is as follows (not shown in the image): A linear drive unit is provided on the external equipment platform for adjusting the position of the crossbeam on the main rod; one end of the linear drive unit is fixed to the external equipment platform, and the other end is fixed to the crossbeam; the linear drive unit drives the crossbeam to slide on the main rod; the linear drive unit is driven by a motor and driven by a lead screw and nut; the nut is fixed to the crossbeam; the lead screw is rotatably connected to the external equipment platform and is driven by the motor to rotate on its own.

[0038] The fixed position of the crossbeam on the main rod is made adjustable. The height of the crossbeam on the main rod is adjusted using a wing nut or a linear drive unit, indirectly regulating the elastic potential energy of the spring and thus controlling the pressure applied to the driven roller, facilitating quantitative management. Furthermore, two methods for adjusting the crossbeam height are provided to meet the needs of different scenarios, improving the versatility of this pressing device.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. An improved pressing device for OSP (Optical Substrate Patch) with different colors for IC carrier board pads, characterized in that: In the sponge rollers used in OSP lines, each set of sponge rollers is divided into a lower drive roller and an upper driven roller; include The crossbeam has multiple guide holes spaced apart, and the crossbeam is fixedly installed on the external main rod. The support rod is slidably connected within the guide hole; The pressure block is fixed to the bottom of the support rod; an arc-shaped groove is provided at the bottom of the pressure block, and the arc-shaped groove fits against the upper part of the driven roller's shaft; The spring is fitted onto the support rod in a compressed state and is located between the pressure block and the crossbeam; under the action of the spring, the pressure block presses down on the upper driven roller with a set pressure.

2. The pressing device for improving OSP color mismatch in IC carrier board pad opening according to claim 1, characterized in that: The fixed position of the crossbeam on the main rod is adjustable.

3. The pressing device for improving OSP color mismatch in IC carrier board pad opening according to claim 2, characterized in that: It also includes a wing nut, which has an external thread on the main rod and a U-shaped limiting groove on the crossbeam; by adjusting the height of the wing nut on the main rod, the wing nut is placed in the U-shaped limiting groove, which restricts the crossbeam from sliding upward along the main rod.

4. The pressing device for improving the color difference of OSP (Optical Substrate Patch) with windowed IC carrier board pads according to claim 3, characterized in that: The U-shaped limiting groove is an open groove structure, including an outer section and an inner section. The size of the outer section is larger than the cross-sectional size of the main rod and smaller than the cross-sectional size of the part of the wing nut placed inside the U-shaped limiting groove. The size of the outer section is larger than the cross-sectional size of the part of the wing nut placed inside the U-shaped limiting groove and smaller than the cross-sectional size of the part of the wing nut not placed inside the U-shaped limiting groove.

5. The pressing device for improving OSP color mismatch in IC carrier board pad opening according to claim 4, characterized in that: The wing nut includes a lower cylindrical section and an upper wing-shaped section. A threaded hole is provided on the wing nut, running from top to bottom through the cylindrical section and the wing-shaped section. The cross-sectional dimensions of the cylindrical section match the cross-sectional dimensions of the inner section of the U-shaped limiting groove.

6. The lamination device for improving OSP color mismatch in IC carrier board pad opening according to any one of claims 3-5, characterized in that: The number of U-shaped limiting grooves is the same as the vertical direction of the main rod; on the crossbeam, several guide holes and several U-shaped limiting grooves are staggered and located on the same straight line.

7. The pressing device for improving OSP color mismatch in IC carrier board pad opening according to claim 2, characterized in that: A linear drive unit is provided on the external equipment platform for adjusting the position of the crossbeam on the main rod; one end of the linear drive unit is fixed to the external equipment platform, and the other end is fixed to the crossbeam; the linear drive unit drives the crossbeam to slide on the main rod; the linear drive unit is driven by a motor and driven by a lead screw and nut; the nut is fixed to the crossbeam; The lead screw is rotatably connected to the machine base of an external device and is driven by a motor to rotate on its own.

8. The pressing device for improving OSP color mismatch in IC carrier board pad opening according to claim 1, characterized in that: A limit block is fixed at the top of the support rod.

9. An OSP line, characterized in that: Along the conveying direction of the production line within the OSP line, a pressing device for improving the OSP color difference of IC carrier board pad opening as described in any one of claims 1-8 is provided on the production line.

10. The OSP line according to claim 9, characterized in that: It also includes a machine base, a main rod, a drive unit, a gear transmission unit, and multiple sets of sponge rollers spaced apart on the machine base; the main rod is fixed on the machine base, and the pressing device is fixed on the main rod; The equipment platform has multiple mounting slots, each containing a retaining clip that is detachably fixed within the slot. The mounting slots are divided into a lower rotating shaft hole and an upper rotating semicircular hole. Each set of sponge rollers includes a lower driving roller and an upper driven roller, with rollers at their ends. The gear transmission unit includes a driving gear and a driven gear. The driving gear is fixed to the roller of the driving roller, and the driven gear is fixed to the roller of the driven roller. The roller of the driving roller is placed in the lower rotating shaft hole and connected to the driving unit. The roller of the driven roller is placed in the upper rotating semicircular hole, and the driven gear meshes with the driving gear under gravity. The pressure block presses against the roller of the driven roller.

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