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CN-224197464-U - Full-open steel plate with composite structure

CN224197464UCN 224197464 UCN224197464 UCN 224197464UCN-224197464-U

Abstract

The utility model relates to the field of ultrafine grid line metal screen plate structures for photovoltaic cell printing, and discloses a full-open steel plate with a composite structure, which comprises a bottom contact layer, a middle layer wire groove layer and an upper ink storage layer which are integrally overlapped and formed in sequence from bottom to top, wherein the bottom surface of the bottom contact layer is provided with a PVD seed crystal layer made of nichrome material. The utility model effectively reduces the physical friction force between the sizing agent and the screen printing plate through the ultra-smooth microscopic morphology of the printing contact side of the steel plate, fundamentally improves the printing screen sticking problem and improves the operation smoothness, the physical film layer of the alloy seed crystal layer and the structure design of the reverse micro taper form a brand new structure different from the traditional structure, the technical evasiveness is strong, the nickel-chromium alloy seed crystal layer and the subsequent electroforming layer form a molecular interlocking structure, each electroforming layer is also an integrated structure with continuous growth of molecular level, the interlayer bonding strength is greatly improved, the problem of delamination easily caused by interlayer stripping is thoroughly solved, and the mechanical strength of an ultrafine wire slot is enhanced.

Inventors

  • YANG SHANGYUN
  • ZHENG KAI
  • ZHOU QING

Assignees

  • 昆山乐邦精密科技有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (10)

  1. 1. The full-open steel plate with the composite structure is characterized by comprising a bottom contact layer (1), a middle layer wire slot layer (2) and an upper layer ink storage layer (3) which are integrally overlapped and formed in sequence from bottom to top; A PVD seed crystal layer (4) made of nichrome material is arranged on the bottom surface of the bottom contact layer (1); The bottom contact layer (1) and the middle layer wire groove layer (2) are of an electroforming integrated structure with molecular-level continuous growth, and the inner wall of an opening of the middle layer wire groove layer (2) is provided with a micro taper gradually expanding towards the upper layer ink storage layer (3); The opening size of the upper ink storage layer (3) is larger than that of the middle wire groove layer (2), and the upper ink storage layer and the middle wire groove layer are communicated.
  2. 2. A full-open steel plate with a composite structure according to claim 1, characterized in that the PVD seed layer (4) has a thickness of 50-80nm and its bottom surface has a micro-morphology in the smooth state of Ra≤0.05 μm.
  3. 3. A full-open steel plate with a composite structure according to claim 1, characterized in that the micro taper of the middle layer wire groove layer (2) forms an included angle of 1.5 DEG to 2.5 DEG with the normal direction of the bottom contact layer (1).
  4. 4. A full-open steel plate with composite structure according to claim 1, characterized in that the thickness of the bottom contact layer (1) is 3-5 μm and the thickness of the middle wire casing layer (2) is 5-10 μm.
  5. 5. The full-open steel plate with the composite structure according to claim 1, wherein an arc transition surface is arranged at the step joint between the middle layer wire groove layer (2) and the upper layer ink storage layer (3), and the radius R of the arc transition surface is 2-5 μm.
  6. 6. The full-open steel plate with the composite structure according to claim 1, wherein the bottom contact layer (1), the middle layer wire groove layer (2) and the upper ink storage layer (3) are made of nickel-cobalt alloy.
  7. 7. A full-open steel plate with a composite structure according to claim 1, wherein the total thickness deviation of the full-open steel plate is controlled within + -1 μm.
  8. 8. A full-open steel plate with a composite structure according to claim 1, characterized in that the bottom contact layer (1) is electroformed from a nickel-cobalt alloy.
  9. 9. The full-open steel plate with the composite structure according to claim 1, wherein the inner wall of the middle layer wire groove layer (2) presents a micro taper inclined plane which is uniformly enlarged from the contact layer to the ink storage layer.
  10. 10. A full-open steel plate with a composite structure according to claim 1, characterized in that the upper ink reservoir (3) has a thickness of 15 μm and an opening width of 150. Mu.m.

Description

Full-open steel plate with composite structure Technical Field The utility model relates to the field of ultra-fine grid line metal screen plate structures for printing photovoltaic cells, in particular to a full-open steel plate with a composite structure. Background At present, a full-open screen plate commonly adopts a multi-layer electroforming process. Existing step configurations typically employ a forward lamination (growth from the ink reservoir to the contact layer) with contact surface flatness limited by the quality of deposition at the end of plating. Layering phenomenon easily occurs between traditional electroforming layers, especially at the positions of ultrafine wire grooves (5-10 mu m), mechanical strength is insufficient, the micro flatness of the bottom surface (printing contact surface) of a metal plate growing forward is difficult to control due to final forming, printing sticking nets are easy to occur, stress concentration is easy to occur at the step steps of the traditional step structure when the traditional step structure is stressed, and nonlinear deformation is caused when the large-size screen plate is in use. Disclosure of utility model The utility model aims to provide a full-open steel plate with a composite structure, which solves the problems of weak interlayer binding force, large roughness of a printing contact surface and uneven stress distribution. In order to solve the technical problems, the utility model is realized by the following technical scheme: The utility model relates to a full-open steel plate with a composite structure, which comprises a bottom contact layer, a middle layer wire slot layer and an upper ink storage layer which are integrally overlapped and formed in sequence from bottom to top; a PVD seed crystal layer made of nichrome material is arranged on the bottom surface of the bottom contact layer; The bottom contact layer and the middle layer wire groove layer are of an electroforming integrated structure with molecular-level continuous growth, and the inner wall of an opening of the middle layer wire groove layer is provided with a micro taper gradually expanding towards the upper layer ink storage layer; The opening size of the upper ink storage layer is larger than that of the middle wire slot layer, and the upper ink storage layer and the middle wire slot layer are communicated. Further, the thickness of the PVD seed layer is 50-80nm, and the microscopic morphology of the bottom surface is smooth with Ra less than or equal to 0.05 mu m. Further, the micro taper of the middle layer wire slot layer forms an included angle of 1.5 degrees to 2.5 degrees with the normal direction of the bottom contact layer. Further, the thickness of the bottom contact layer is 3-5 μm, and the thickness of the middle layer wire groove layer is 5-10 μm. Further, an arc transition surface is arranged at the joint of the step between the middle layer wire groove layer and the upper layer ink storage layer, and the radius R of the arc transition surface is 2-5 mu m. Further, the bottom contact layer, the middle layer wire slot layer and the upper ink storage layer are all made of nickel-cobalt alloy materials. Further, the total thickness deviation of the full-open steel plate is controlled within +/-1 mu m. Further, the bottom contact layer is electroformed from a high purity nickel-cobalt alloy. Further, the inner wall of the middle layer wire slot layer presents a micro taper inclined plane which is uniformly expanded from the contact layer to the ink storage layer. Further, the upper ink reservoir layer has a thickness of 15 μm and an opening width of 150 μm. The utility model has the following beneficial effects: (1) According to the utility model, the ultra-smooth microscopic morphology is provided on the screen printing contact side, so that the physical friction force between the slurry and the screen can be effectively reduced, the problem of printing and sticking the screen easily occurring in the traditional screen is fundamentally improved, the smoothness of printing operation is improved, and a brand new structure different from the traditional straight step stepped hole is formed by virtue of the physical film design of the alloy seed crystal layer and the structural characteristics of reverse micro taper, and the technology evasiveness is strong, and the special structural advantage is provided. (2) The utility model takes the nickel-chromium alloy seed crystal layer as a growth substrate, forms a molecular interlocking connection structure with the subsequent electroforming layer, and is also an integrated structure of molecular continuous growth between the electroforming layers, thereby greatly improving the bonding strength between the screen layers, thoroughly solving the industrial problems of easy stripping and layering between the traditional electroforming screen layers and enhancing the mechanical strength of the screen at the superfine wire sl