Lamination mold for pre-pressing green ceramic tape in HTCC process

Abstract

The utility model discloses a lamination mold for pre-pressing a green tape in an HTCC process, and the lamination mold comprises a lamination plate which comprises a substrate for bearing the green tape; the lamination plate further comprises four side plates, the four side plates are arranged on the four side edges of the base plate respectively, and every two adjacent side plates are arranged at intervals to form four openings located in the four corners. The lamination mold further comprises two embedded plates, and the two embedded plates are used for being arranged at the two ends of a plurality of green ceramic tapes respectively. Wherein the length of the green tape is L and the width of the green tape is D, the length of the inner spacing of the side plates of the laminated plate is L + and the width of the inner spacing of the side plates of the laminated plate is D +, and the length of the embedded plate is LL and the width of the embedded plate is DD; the following conditions are met: L + = LL + x1 = L + y1, and D + = DD + x2 = D + y2; x < 1 >, x < 2 >, y < 1 > and y < 2 > are adjusting parameters, the value range of y < 1 > and y < 2 > is 1 + / -0.1 mm, and the value range of x < 1 > and x < 2 > is 0.5 + / -0.1 mm. The efficiency and stability of pre-pressing treatment are improved.

Description

Technical Field

[0001] The present application relates to the field of HTCC processing of electronic packaging, and in particular to a lamination die for pre-pressing green ceramic tapes in the HTCC process. Background Art

[0002] In the current electronic packaging field, metal ceramic housings, ceramic substrates, etc. occupy a huge market share, and the HTCC processing technology is the main processing method for ceramic parts. The raw porcelain tapes to be processed cast by the HTCC process usually have only a few thickness specifications and are very easy to deform. In order to obtain processed porcelain tapes of other thicknesses and stabilize the subsequent processing performance, a pre-processing treatment is usually carried out, and the porcelain tapes are laminated using isostatic pressing, that is, pre-pressing treatment. The conventional pre-pressing lamination process uses two flat plates to stack the porcelain tape to be pressed. Manual alignment is required during lamination, and because the steel sheets and films of the laminate are very smooth, very skilled operating techniques are required to prevent them from sliding when encapsulating them. If the encapsulation is not tight enough, it will also cause displacement and dislocation when under pressure, and the pressure effect of the porcelain tape will be unstable. Therefore, there is a need for a processing method that can improve efficiency and stabilize the pre-pressing effect of the porcelain tape.

[0003] CN107658230A discloses a method for controlling the surface roughness of green ceramic sheets and LTCC substrates. This method involves directly stacking green ceramic sheets with polymer films on a flat steel plate. This method can easily cause the ceramic strips to shift and misalign when subjected to pressure. The LTCC lamination method disclosed in CN102501557A utilizes a lamination table with positioning pins at the four corners. This method requires drilling holes in the green ceramic sheets, making the operation more cumbersome. Summary of the Invention

[0004] The utility model provides a lamination die for pre-pressing green porcelain strips in a HTCC process, so as to solve the problems of efficiency and stability of porcelain strip pre-pressing treatment.

[0005] A lamination die for pre-pressing green ceramic strips in a HTCC process, comprising:

[0006] A laminate plate including a base plate for carrying the green porcelain tape;

[0007] The laminated plate further includes four side plates, which are respectively arranged on the four sides of the base plate, and adjacent side plates are spaced apart to form four openings at the four corners;

[0008] The lamination mold further comprises two inner insert plates, which are respectively used to be installed at both ends of the plurality of green porcelain strips;

[0009] Among them, the dimensions of the raw porcelain tape are length L and width D, the inner spacing of the side plates of the laminated plate is length L+ and width D+, the embedded plate is length LL and width DD; the following conditions are met: L+=LL+x1=L+y1, D+=DD+x2=D+y2; x1, x2, y1, y2 are adjustment parameters, the value range of y1, y2 is 1±0.1mm, and the value range of x1, x2 is 0.5±0.1mm.

[0010] Furthermore, the four openings include one larger opening and three smaller openings, the smaller opening does not exceed 1 / 10 of the side length of the laminated plate, and the larger opening does not exceed 1 / 3 of the side length of the laminated plate.

[0011] Furthermore, the substrate thickness N is greater than 5 mm, the baffle thickness M is greater than 2 mm, and the baffle height to thickness ratio H:M is 5:1.

[0012] Furthermore, the side plate height H1 is 5-30 mm, and H1 is higher than the total material height after lamination.

[0013] Furthermore, the lamination mold further comprises a plurality of plastic films, and the plurality of plastic films and the plurality of green porcelain tapes are alternately arranged.

[0014] Beneficial effects: baffles are added around the stacking plate, and one large and three small openings are left at the four corners, which makes it easy to take the ceramic tape in and out, while limiting the horizontal movement of the ceramic tape during the stacking of the raw ceramic tape and the subsequent encapsulation and lamination process to the greatest extent. When using the stacking plate for pre-stressing stacking, there is no need for manual alignment. You only need to place the corresponding materials and ceramic tapes horizontally in the stacking plate in order. The openings at the four corners can effectively avoid the problem of the ceramic tapes being bent and stacked during placement due to their soft material, and needing to be taken out and re-placed to stretch them out. The large openings make it more convenient for operators to take and place the ceramic tapes. The entire operation process is very simple and does not require skilled operating skills. It greatly improves the efficiency and stability of the pre-pressing treatment of the ceramic tape before processing. The entire process can be completed by a very simple operating method, which reduces the difficulty of converting to automated production in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the stacking of a laminated plate without a baffle according to an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the laminated plate with baffles according to an embodiment of the present application;

[0017] Figure 3 This is a schematic structural diagram of the raw porcelain belt in Example 2 of the present application;

[0018] Figure 4 This is a schematic diagram of the structure of the embedded steel sheet in Example 2 of this application;

[0019] Figure 5 This is a schematic structural diagram of the laminated plate in Example 2 of the present application;

[0020] Reference numerals: Figure 1 、 2 In the figure, a is a laminated plate, b is a steel sheet, c is a green porcelain tape, and d is a plastic film; DETAILED DESCRIPTION

[0021] The technical solution of this application is further described below with reference to the accompanying drawings.

[0022] The present application provides a lamination die for pre-pressing green ceramic tape in a HTCC (high temperature co-fired multilayer ceramic) process, comprising:

[0023] A laminate plate including a base plate for carrying the green porcelain tape;

[0024] The laminated plate further includes four side plates, which are respectively arranged on the four sides of the base plate, and adjacent side plates are spaced apart to form four openings at the four corners;

[0025] The lamination mold further comprises two inner insert plates, which are respectively used to be installed at both ends of the plurality of green porcelain strips;

[0026] Among them, the dimensions of the raw porcelain tape are length L and width D, the inner spacing of the side plates of the laminated plate is length L+ and width D+, the embedded plate is length LL and width DD; the following conditions are met: L+=LL+x1=L+y1, D+=DD+x2=D+y2; x1, x2, y1, y2 are adjustment parameters, the value range of y1, y2 is 1±0.1mm, and the value range of x1, x2 is 0.5±0.1mm.

[0027] Furthermore, the four openings include one larger opening and three smaller openings, the smaller opening does not exceed 1 / 10 of the side length of the laminated plate, and the larger opening does not exceed 1 / 3 of the side length of the laminated plate.

[0028] Furthermore, the substrate thickness N is greater than 5 mm, the baffle thickness M is greater than 2 mm, and the baffle height to thickness ratio H:M is 5:1.

[0029] Furthermore, the side plate height H1 is 5-30 mm, and H1 is higher than the total material height after lamination.

[0030] Furthermore, the lamination mold further comprises a plurality of plastic films, and the plurality of plastic films and the plurality of green porcelain tapes are alternately arranged.

[0031] The specific usage of this application includes:

[0032] Tooling and mold design:

[0033] According to the length L and width D of the raw porcelain strip produced in batches, the inner spacing length L+ and width D+ of the laminated plate baffle are set with reasonable tolerances, and the length LL and DD of the matching embedded flat steel sheet are set.

[0034] Set the appropriate baffle height H1 according to the total height of the pre-pressed porcelain belt and material.

[0035] According to the material properties of the laminated plate, the thickness M of the laminated plate baffle and the thickness N of the laminated plate bottom substrate are set.

[0036] Leave one large opening and three small openings at the four corners of the baffle.

[0037] Lamination preload:

[0038] First place an embedded flat steel sheet at the bottom of the laminated plate, then cross-stack the plastic film and the raw porcelain tape to be pressed. The bottom and top are both plastic films, and then place another embedded flat steel sheet on the top film.

[0039] Wrap all sharp parts with soft rubber and place them in self-sealing tape for vacuum sealing. Finally, place them in a laminating machine and use conventional process parameters to perform isostatic pressing pretreatment on the raw porcelain tape.

[0040] After lamination, unpack and take out the porcelain tape and materials one by one.

[0041] Preferred:

[0042] 1. The dimensions of the raw porcelain tape are length L and width D. The inner spacing of the laminated plate baffle is length L+ and width D+. The length of the matching embedded flat steel sheet is LL and DD. The relationship is L+=LL+x1=L+y1, D+=DD+x2=D+y2. Usually y1 and y2 are 1±0.1mm. The porcelain tape can have a small space for movement in the baffle, but the corners will not be compressed and deformed due to the misalignment of the upper and lower porcelain tapes. x1 and x2 are about 0.5±0.1mm, so that the embedded flat steel sheet can be easily removed and placed, and there is a large enough smooth and flat area as a pressure-bearing substrate.

[0043] 2. After lamination, the total material height should be less than the baffle height H1, which is usually around 5-30mm, so that more porcelain tapes can be stacked at one time, and the pressure effects on the bottom and top of the stacked porcelain tapes are basically the same during lamination.

[0044] 3. Openings should be made at the four corners of the baffle. The opening width is generally about 5mm. It is recommended that it should not exceed 1 / 10 of the length of the laminated plate. One of the four openings should be made into a large opening. The opening size is generally about 30mm. It is recommended that it should not exceed 1 / 3 of the length of the laminated plate.

[0045] 4. Laminated plates and embedded flat steel materials are usually made of stainless steel, and are usually formed by machining, etching, casting and other processing methods. The thickness N of the substrate is generally about 10mm, and it is recommended to be above 5mm. The thickness M of the baffle is generally above 2mm, and the general baffle height and thickness ratio H:M is about 5:1.

[0046] 5. The plastic film stacked crosswise with the porcelain tape has a certain toughness, no wrinkles, and a smooth and non-sticky surface. Example 1

[0047] like Figure 1 As shown, this lamination method is traditional without baffles. A is the lamination plate, b is the steel sheet, c is the raw porcelain tape, and d is the plastic film. The lamination sequence is lamination plate - steel sheet - plastic film - porcelain tape - plastic film - porcelain tape... - porcelain tape - film - lamination plate. Lamination requires careful alignment. A thick lamination plate is used on the top layer to mitigate horizontal slippage during the subsequent encapsulation and lamination process. However, skilled operation is still required. Slippage during encapsulation requires re-lamination, and excessive slippage during lamination will result in product failure.

[0048] like Figure 2 As shown, this lamination method is the self-aligning lamination method of this application. A is the laminated plate, B is the steel sheet, C is the raw porcelain tape, and D is the plastic film. The lamination sequence is laminated plate - steel sheet - plastic film - porcelain tape - plastic film - porcelain tape... - porcelain tape - film - steel sheet. During lamination, simply place the materials onto the laminate in order, eliminating the risk of slippage during the subsequent encapsulation and lamination process. Example 2

[0049] like Figure 3 As shown, the size of the raw porcelain tape is 203×203mm. According to the production batch management, the porcelain tapes of the same batch need to be stacked together and laminated at the same time to keep the process hours consistent and mixed with other batches. The total thickness of the material after lamination of a single batch is about 5-8mm. The corresponding tooling mold is designed:

[0050] 1. Such as Figure 4 : Steel sheet size 203.5mm×203.5mm.

[0051] 2. Such as Figure 5 The spacing between the laminated baffles is 204mm x 204mm. The baffle height is 10mm and the thickness is 2mm. The remaining dimensions are: the base plate thickness is 10mm, the minimum opening is 7mm, and the maximum opening is 30mm.

[0052] After the mold is completed, the ceramic strip can be pre-stacked efficiently and stably.

[0053] The above is only a preferred embodiment of this patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lamination die for pre-pressing green ceramic strips in the HTCC process, comprising: A laminate plate including a base plate for carrying the green porcelain tape; Characterized in that the laminated plate further comprises four side plates, which are respectively arranged on the four sides of the base plate, and adjacent side plates are spaced apart to form four openings at the four corners; The lamination mold further comprises two inner insert plates, which are respectively used to be installed at both ends of the plurality of green porcelain strips; Among them, the dimensions of the raw porcelain tape are length L and width D, the inner spacing of the side plates of the laminated plate is length L+ and width D+, the embedded plate is length LL and width DD; the following conditions are met: L+=LL+x1=L+y1, D+=DD+x2=D+y2; x1, x2, y1, y2 are adjustment parameters, the value range of y1, y2 is 1±0.1mm, and the value range of x1, x2 is 0.5±0.1mm.

2. The lamination mold for pre-pressing green ceramic tape in the HTCC process according to claim 1, characterized in that: The four openings include one larger opening and three smaller openings, the smaller opening does not exceed 1 / 10 of the side length of the laminated plate, and the larger opening does not exceed 1 / 3 of the side length of the laminated plate.

3. The lamination mold for pre-pressing green ceramic tape in HTCC process according to claim 1, characterized in that: The substrate thickness N is greater than 5 mm, the baffle thickness M is greater than 2 mm, and the baffle height to thickness ratio H:M is 5:

1.

4. The lamination mold for pre-pressing green ceramic tape in the HTCC process according to claim 1, characterized in that: The side plate height H1 is 5-30 mm, and H1 is higher than the total material height after lamination.

5. The lamination mold for pre-pressing green ceramic tape in HTCC process according to claim 1, characterized in that: The lamination mold further comprises a plurality of plastic films, which are alternately arranged with the plurality of green porcelain tapes.

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