Semi-formed laminated plate

Abstract

The utility model discloses a semi-forming press-fit plate which comprises a plate to be pressed. And the covering type sheets are respectively abutted against two sides of the to-be-laminated plate, and the covering type sheets are aluminum sheets. Wherein the covering type sheet is an aluminum sheet, compared with a copper sheet, the roughness of the aluminum sheet is smaller, the aluminum sheet cannot be tightly combined with an adhesive of a to-be-laminated plate in the laminating process, the pulling resistance of the aluminum sheet is higher, the plate can be peeled off at a time after being laminated, and the plate disassembling efficiency of the semi-formed laminated plate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB manufacturing, in particular to a semi-formed pressed plate. Background Art

[0002] With the rapid development of science and technology, various electronic products are widely used, requiring smaller and thinner sizes. Therefore, the process requirements for printed circuit boards (PCBs) are getting higher and higher, and the density of various components and interfaces is getting higher and higher. Therefore, in the production process of PCBs, high-level and high-alignment precision pressing boards has become a development trend.

[0003] In the related technology, when the PCB pressing process produces core board pressing products, in order to prevent the semi-cured sheet from flowing adhesive to contaminate the steel plate and foreign matter from contaminating the product, 1 / 2OZ copper foil is used between the steel plate and the board during stacking. Since the semi-cured sheet flows adhesive after pressing, the copper foil is difficult to peel off from the core board, and the output speed of board removal is low, resulting in a bottleneck in board removal capacity. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a semi-formed pressed plate, the cover sheet is an aluminum sheet, the aluminum sheet has a smaller roughness than the copper sheet, and will not be tightly combined with the adhesive of the plate to be pressed during the pressing process, and the aluminum sheet has a stronger pulling resistance, and the plates can be peeled off at one time after pressing, which can improve the efficiency of removing the semi-formed pressed plates.

[0005] The semi-formed pressed plate according to the embodiment of the utility model comprises: a plate to be pressed; and a covering sheet, wherein the covering sheets are respectively abutted against two sides of the plate to be pressed, and the covering sheets are aluminum sheets.

[0006] According to the semi-formed pressed plate of the embodiment of the utility model, the covering sheet is an aluminum sheet. Compared with the copper sheet, the aluminum sheet has a smaller roughness. During the pressing process, it will not be tightly combined with the adhesive of the plate to be pressed. The aluminum sheet has a stronger tensile resistance. After pressing, the plates can be peeled off at one time, which can improve the efficiency of removing the semi-formed pressed plates.

[0007] According to some embodiments of the present invention, the surface roughness of the coating sheet is Rz, and Rz satisfies the relationship: 0.4 μm≤Rz≤0.5 μm.

[0008] According to some embodiments of the present invention, the thickness of the coating sheet is L, and L satisfies the relationship: 72 μm≤L≤88 μm.

[0009] According to some embodiments of the present invention, the panels to be pressed together include: a plurality of core panels, the plurality of core panels are stacked and PP material is arranged between two adjacent core panels, and the two outermost core panels are respectively in contact with two covering sheets.

[0010] According to some embodiments of the present invention, the PP material is a prepreg cut sheet, and the thickness of the PP material is half the thickness of the core board.

[0011] According to some embodiments of the present invention, the width of the PP material is A, the width of the core board is B, and A and B satisfy the relationship: AB≥50㎜.

[0012] According to some embodiments of the present invention, the width of the PP material is A, the width of the coating sheet is C, and A and B satisfy the relationship: CA ≥ 25 mm.

[0013] According to some embodiments of the present invention, the covering sheet is a coil.

[0014] According to some embodiments of the present invention, in the width direction, the center line of the core plate coincides with the center of the covering sheet.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is an exploded view of a semi-formed pressed plate according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] 11. Core board; 12. PP material; 13. Covering sheet. DETAILED DESCRIPTION

[0020] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0021] Reference below Figure 1 A semi-formed pressed board according to an embodiment of the present invention is described.

[0022] The semi-formed pressed plate includes: a plate to be pressed and a covering sheet 13, the covering sheets 13 are respectively abutted on both sides of the plate to be pressed, and the covering sheets 13 are aluminum sheets. Specifically, the plate to be pressed is pressed by a pressing device, and the pressing device is provided with an upper steel plate and a lower steel plate. First, one of the covering sheets 13 is attached to the lower side of the pressing device, and the other covering sheet 13 is attached to the upper side of the pressing device, and then the plate to be pressed is placed between the two covering sheets 13, and the plate to be pressed is double-sidedly covered.

[0023] The covering sheet 13 is an aluminum sheet. Compared with the copper sheet, the aluminum sheet has a smaller roughness. During the pressing process, it will not be tightly bonded with the adhesive of the plate to be pressed. The aluminum sheet has a stronger tensile resistance. After pressing, the plates can be peeled off at one time, which can improve the efficiency of removing the semi-formed pressed plates.

[0024] In some embodiments, the surface roughness of the coating sheet 13 is Rz, and Rz satisfies the relationship: 0.4μm≤Rz≤0.5μm. The surface roughness of the coating sheet 13 ranges from 0.4μm to 0.5μm, ensuring that the roughness of the coating sheet 13 is small, so that the coating sheet 13 does not adhere to the melted PP material 12 after the laminated plate is laminated, resulting in the inability to peel off. If the roughness of the aluminum sheet is higher than 0.5μm, the coating sheet 13 may be tightly combined with the melted PP material 12 during the lamination process, resulting in low efficiency in removing the semi-cured laminate.

[0025] like Figure 1 As shown, the thickness of the cover sheet 13 is L, and L satisfies the relationship: 72μm≤L≤88μm. In other words, if the thickness of the cover sheet 13 is too thin, it is easy to tear when peeling from the plate to be pressed, and cannot be peeled off at one time. The thickness of the cover sheet 13 is set between 72μm and 88μm to ensure the tearing strength of the cover sheet 13 and avoid the tearing of the cover sheet 13 affecting the efficiency of board removal.

[0026] If the thickness of the covering sheet 13 is less than 72 μm, it is easy to be torn when peeled off from the plate to be pressed and cannot be peeled off at one time; if the thickness of the covering sheet 13 is greater than 88 μm, the strength of the covering sheet 13 is not significantly improved, resulting in a waste of material.

[0027] In some embodiments, the plate to be pressed comprises: a plurality of core plates 11, the plurality of core plates 11 are stacked and a PP material 12 is arranged between two adjacent core plates 11, and the two outermost core plates 11 are respectively in contact with two coating sheets 13. The semi-finished pressed plate is coated on both sides before pressing, which increases the fixity between different core plates 11 during pressing at high temperature and high pressure, prevents the core plates 11 from deviating from their original positions, improves the alignment accuracy between the core plates 11 and the core plates 11, and improves the production quality and yield.

[0028] A plurality of core boards 11 are stacked and overlapped, and a PP material 12 is arranged between two adjacent core boards 11. The PP material 12 is in a semi-solid state before lamination, and becomes a solidified state after being melted at a high temperature, and serves as an insulating layer to bond the core boards 11 together. The upper surface and the lower surface of the board to be laminated are respectively abutted against two covering sheets 13, that is, the two outermost core boards 11 are respectively abutted against two covering sheets 13, and the board to be laminated and the two covering sheets 13 are peeled off after lamination is completed.

[0029] In some embodiments, the PP material 12 is cut from prepregs. The PP material 12 is cut from ordinary prepregs, and expired materials can be used.

[0030] In some embodiments, the thickness of the PP material 12 is half the thickness of the core board 11, which can ensure the connection strength between the core boards 11 and 11. At the same time, the thickness of the PP material 12 should not be too thick, which may easily lead to the thickness of the laminated board being too thick, resulting in a waste of resources.

[0031] In some embodiments, the PP material 12 can be a 2116 or 1080 type prepreg. This type of PP material 12 has a finer glass fiber cloth roughness, is less likely to produce pits, and is easy to press.

[0032] The semi-finished pressed board is double-sided coated before pressing, which increases the fixation between different core boards 11 during high temperature and high pressure pressing, prevents the core board 11 from deviating from its original position, improves the alignment accuracy between the core boards 11 and 11, and improves the production quality and yield; the PP material 12 used for coating is widely available, and edge materials or expired materials can be used according to the size of the core board 11, which is low in cost; the cutting process is simple, the production operation is not difficult, and the flexibility is good; at the same time, it reduces multiple pressing processes, shortens the production cycle, and reduces production costs.

[0033] In some embodiments, the width of the PP material 12 is A, the width of the core board 11 is B, and A and B satisfy the relationship: AB ≥ 50 mm. Specifically, the width of the PP material 12 is greater than the width of the core board 11, and the difference between the width of the PP material 12 and the width of the core board 11 is greater than 50 mm, so that the PP material 12 can completely cover the part where the core boards 11 are bonded to each other, ensuring the bonding strength of the two adjacent core boards 11, thereby ensuring the structural stability of the laminated boards after lamination.

[0034] Furthermore, the width of the PP material 12 is about 25 mm larger than the width of the board to be pressed. In other words, the size of the PP material 12 between the core boards 11 and 11 should be larger than the core board 11, and a 25 mm margin should be reserved on both sides of the width direction of the core board 11 for the PP material 12, so that the side surfaces of the core board 11 are also bonded together, further ensuring the bonding strength between the core boards 11 and 11, thereby ensuring the structural stability of the board to be pressed after pressing.

[0035] In some embodiments, the width of the PP material 12 is A, the width of the covering sheet 13 is C, and A and B satisfy the relationship: CA ≥ 25 mm. Specifically, the width of the PP material 12 is smaller than the width of the covering sheet 13, and the difference between the width of the covering sheet 13 and the width of the PP material 12 is greater than 25 mm, so as to prevent the PP material 12 from flowing out of the covering sheet 13 when in a semi-cured state, resulting in failure of the lamination of the panels to be laminated, thereby causing waste of materials.

[0036] Furthermore, the width dimension of the covering sheet 13 is about 12.5 mm larger than the width dimension of the PP material 12 on one side, that is to say, the width of the covering sheet 13 should not only be larger than the PP material 12, but the same size of spacing should be left on both sides of the width direction of the covering sheet 13 relative to the PP material 12 to prevent the PP material 12 from flowing out of the covering sheet 13 when it is in a semi-cured state, resulting in failure of lamination of the panels to be laminated, thereby causing waste of materials.

[0037] In some embodiments, the coating sheet 13 is a coil, and the coil coating sheet 13 can be fed to the boards to be laminated in time, thereby increasing the feeding speed of the coating sheet 13, thereby increasing the lamination efficiency of the boards to be laminated and further improving production efficiency.

[0038] In some embodiments, in the width direction, the center line of the core board 11 coincides with the center of the covering sheet 13. After multiple core boards 11 are placed on the covering sheet 13, the same size of spacing is left on both sides of the covering sheet 13 in the width direction to prevent the PP material 12 from flowing out of the covering sheet 13 when it is in a semi-cured state, resulting in failure of the pressing of the panels to be pressed, thereby causing waste of materials.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A semi-formed pressed board, characterized in that: include: Plate to be laminate; The covering sheet (13) is respectively in contact with two sides of the plate to be pressed, the covering sheet (13) is an aluminum sheet, and the surface roughness of the covering sheet (13) is Rz, and Rz satisfies the relationship: 0.4μm≤Rz≤0.5μm.

2. The semi-formed pressed board according to claim 1, characterized in that: The thickness of the coating sheet (13) is L, and L satisfies the relationship: 72 μm≤L≤88 μm.

3. The semi-formed pressed board according to claim 1, characterized in that: The plate to be pressed comprises: a plurality of core plates (11), the plurality of core plates (11) are stacked and a PP material (12) is arranged between two adjacent core plates (11), and the two outermost core plates (11) are respectively in contact with two covering sheets (13).

4. The semi-formed pressed board according to claim 3, characterized in that: The PP material (12) is a prepreg cut piece, and the thickness of the PP material (12) is half the thickness of the core board (11).

5. The semi-formed pressed board according to claim 3, characterized in that: The width of the PP material (12) is A, the width of the core plate (11) is B, and A and B satisfy the relationship: AB≥50mm.

6. The semi-formed pressed board according to claim 3, characterized in that: The width of the PP material (12) is A, the width of the coating sheet (13) is C, and A and B satisfy the relationship: CA ≥ 25 mm.

7. The semi-formed pressed board according to claim 1, characterized in that: The coating sheet (13) is a coiled material.

8. The semi-formed pressed board according to claim 3, characterized in that: In the width direction, the center line of the core plate (11) coincides with the center of the covering sheet (13).

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