CN112584609A - Step plate and manufacturing process thereof - Google Patents

Step plate and manufacturing process thereof Download PDF

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Publication number
CN112584609A
CN112584609A CN202011463691.0A CN202011463691A CN112584609A CN 112584609 A CN112584609 A CN 112584609A CN 202011463691 A CN202011463691 A CN 202011463691A CN 112584609 A CN112584609 A CN 112584609A
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China
Prior art keywords
composite
hard
layer
plate
board layer
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Pending
Application number
CN202011463691.0A
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Chinese (zh)
Inventor
罗勇
余宁
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Shenzhen Yichao Express Technology Co ltd
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Shenzhen Yichao Express Technology Co ltd
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Priority to CN202011463691.0A priority Critical patent/CN112584609A/en
Publication of CN112584609A publication Critical patent/CN112584609A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
    • H05K1/0298—Multilayer circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/26—Cleaning or polishing of the conductive pattern
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H05K3/282—Applying non-metallic protective coatings for inhibiting the corrosion of the circuit, e.g. for preserving the solderability
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits
    • H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards

Abstract

The invention discloses a step plate and a manufacturing process thereof, relating to the technical field of PCB manufacturing; the manufacturing process comprises the following steps: s10, manufacturing a circuit of the first composite board; s20, manufacturing a circuit of a second composite board; s30, silk-screen printing of corrosion-resistant ink; s40, manufacturing a hollowed-out part; s50, pressing, namely placing the PP sheet between the first composite board and the second composite board, and putting the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer into a vacuum compressor for pressing, wherein the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer are both attached to the PP sheet; s60, manufacturing a circuit, namely drilling a through hole, chemically depositing copper and electroplating copper on the pressed plate, and etching the circuit on the outer surfaces of the L1 hard plate layer and the L4 hard plate layer; s70, cleaning the silk screen printing film, namely putting the plate etched in the step S60 into ink removing medicinal liquor, and cleaning the silk screen printing film at the bottom of the step after soaking; the invention has the beneficial effects that: the invention provides a step plate and a manufacturing process thereof, and the step plate is lower in technical threshold, lower in cost and higher in yield.

Description

Step plate and manufacturing process thereof
Technical Field
The invention relates to the technical field of circuit board manufacturing, in particular to a step board and a manufacturing process thereof.
Background
At present, a circuit and a welding PAD are designed at the bottom of a step board, and one scheme is that the circuit is formed by ablation cutting and the PAD is welded by laser, so that equipment is expensive and high in investment; the other scheme is that the circuits and the welding PAD are protected by sticking special adhesive tapes, and the subsequent procedures of removing adhesive, depositing copper and etching are carried out; the liquid medicine of high temperature and high corrosion leads to the circuit to open the short circuit very easily bad, directly leads to scrapping, because the step degree of depth is darker the finished product and tears the sticky tape not easy operation, and it is time-consuming moreover to still take a lot of work.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the step plate and the manufacturing process thereof, and the step plate is lower in technical threshold, lower in cost and higher in yield.
The technical scheme adopted by the invention for solving the technical problems is as follows: the improvement of the manufacturing process of the step plate is that the manufacturing process comprises the following steps:
s10, circuit manufacturing of a first composite board, wherein the first composite board consists of a composite L3 hard board layer and a composite L4 hard board layer, copper layers are respectively arranged on the upper surface of the L3 hard board layer and the lower surface of the L4 hard board layer, and circuit manufacturing is carried out on the upper surface of the L3 hard board layer;
s20, manufacturing a circuit of a second composite board, wherein the second composite board consists of a L1 hard board layer and an L2 hard board layer which are compounded, copper layers are respectively arranged on the upper surface of the L1 hard board layer and the lower surface of the L2 hard board layer, and the circuit of the lower surface of the L2 hard board layer is manufactured;
s30, silk-screen printing of corrosion-resistant ink, namely silk-screen printing of the corrosion-resistant ink on a local position to be protected on the circuit of the L3 hard board layer, forming a silk-screen film after high-temperature curing, and then performing browning;
s40, manufacturing hollowed parts, namely manufacturing hollowed parts on the second composite board and the PP sheet corresponding to the silk-screen position of the first composite board to form the hollowed parts, and browning the second composite board;
s50, pressing, namely placing the PP sheet between the first composite board and the second composite board, and putting the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer into a vacuum compressor for pressing, wherein the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer are both attached to the PP sheet;
s60, manufacturing a circuit, namely drilling a through hole, chemically depositing copper and electroplating copper on the pressed plate, and etching the circuit on the outer surfaces of the L1 hard plate layer and the L4 hard plate layer;
and S70, cleaning the silk screen printing film, namely putting the plate etched in the step S60 into ink removing medicinal liquor, and cleaning the silk screen printing film at the bottom of the step after soaking.
Further, the first composite board in the step S10 and the second composite board in the step S20 are both double-sided copper-clad boards.
Further, step S10 includes a process of bonding PAD.
Further, in step S30, the temperature of the anti-corrosion ink is 150 + -10 deg.C and the time is 30 + -5 min, and the thickness of the formed silk-screen film is 10-15 μm.
Further, in step S50, the temperature during pressing is 195-210 ℃, the pressing time is 1.5-2h, and the pressure is 25-32kg/m2。
Further, in step S70, the temperature of the ink-removing liquid medicine is 75-85 ℃, and the soaking time is 10-15 min.
In another aspect, the invention further provides a step plate, which is improved in that the step plate comprises a first composite plate and a second composite plate which are subjected to vacuum lamination, wherein the first composite plate consists of a composite L3 hard plate layer and a composite L4 hard plate layer, the second composite plate consists of a composite L1 hard plate layer and a composite L2 hard plate layer, and the composite L2 hard plate layer is attached to the composite L3 hard plate layer;
a circuit is arranged on one surface, facing the second composite board, of the L3 hard board layer, and anti-corrosion ink is printed on the circuit in a silk screen mode before the first composite board and the second composite board are subjected to vacuum lamination to form a silk screen printing film; the positions of the L1 hard board layer and the L2 hard board layer corresponding to the lines of the L3 hard board layer are hollowed out.
In the structure, the upper surface of the L1 hard board layer and the lower surface of the L4 hard board layer are both provided with copper layers, and lines are etched; and the L1 hard board layer, the L2 hard board layer, the L3 hard board layer and the L4 hard board layer are provided with through conductive through holes.
In the structure, the screen printing film is cleaned by ink removing liquid medicine.
In the structure, the PP sheet is arranged between the first composite board and the second composite board, and the vacuum pressing machine is adopted to realize the pressing of the first composite board and the second composite board.
The invention has the beneficial effects that: due to the existence of the silk-screen printing film, the circuit on the L3 hard board layer cannot be damaged; the screen printing film is cleaned by adopting the ink removing liquid medicine, so that the screen printing film is convenient to remove, and the screen printing film is very convenient and fast when the step depth is deep.
Drawings
FIG. 1 is a schematic flow chart of a step plate manufacturing process according to the present invention.
Fig. 2 is a schematic product structure diagram of step S10 in the step plate manufacturing process of the present invention.
Fig. 3 is a schematic product structure diagram of step S20 in the step plate manufacturing process of the present invention.
Fig. 4 is a schematic product structure diagram of step S30 in the step plate manufacturing process of the present invention.
Fig. 5 is a schematic product structure diagram of step S40 in the step plate manufacturing process of the present invention.
Fig. 6 is a schematic product structure diagram of step S50 in the step plate manufacturing process of the present invention.
Fig. 7 is a schematic product structure diagram of step S60 in the step plate manufacturing process of the present invention.
Fig. 8 is a schematic product structure diagram of step S70 in the step plate manufacturing process of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Example 1
Referring to fig. 1, the present invention discloses a manufacturing process of a step plate, in this embodiment, the manufacturing process includes the following steps:
s10, manufacturing a circuit of a first composite board 10, wherein the first composite board 10 consists of an L3 hard board layer 103 and an L4 hard board layer 104 which are compounded, the upper surface of the L3 hard board layer 103 and the lower surface of the L4 hard board layer 104 are both provided with copper layers, and the circuit 105 is manufactured on the upper surface of the L3 hard board layer 103; additionally, a process of bonding the PAD107 is included; referring to fig. 2, a schematic cross-sectional view of the first composite plate 10 in this embodiment is shown;
s20, manufacturing a circuit 105 of a second composite board 20, wherein the second composite board 20 consists of an L1 hard board layer 201 and an L2 hard board layer 202 after being compounded, the upper surface of the L1 hard board layer 201 and the lower surface of the L2 hard board layer 202 are both provided with copper layers, and the circuit 105 manufacturing is performed on the lower surface of the L2 hard board layer 202; in this embodiment, the first composite board 10 in the step S10 and the second composite board 20 in the step S20 are both double-sided copper-clad boards; as shown in fig. 3, which is a schematic cross-sectional view of the second composite board 20;
s30, silk-screen printing of corrosion-resistant ink, namely silk-screen printing of the corrosion-resistant ink on a local position to be protected on the line of the L3 hard board layer 103, forming a silk-screen membrane 30 after high-temperature curing, and then performing browning; in step S30, the temperature of the anti-corrosion ink during curing is 150 ℃, the time is 30min, and the thickness of the formed silk-screen film 30 is 15 μm; as shown in fig. 4, a schematic cross-sectional view of the first composite board 10 with the screen-printed film 30 formed thereon;
s40, manufacturing hollowed parts, namely manufacturing hollowed parts in the silk-screen positions of the second composite board 20 and the PP sheet 40 corresponding to the first composite board 10 to form the hollowed parts 106, and browning the second composite board 20; wherein, the PP sheet 40 is a non-flowing PP, as shown in fig. 5, which is a schematic cross-sectional view of the second composite board 20 and the PP sheet 40 after being hollowed out;
s50, pressing, namely placing the PP sheet between the first composite board 10 and the second composite board 20, attaching the lower surface of the L2 hard board layer 202 and the upper surface of the L3 hard board layer 103 to the PP sheet 40, and pressing in a vacuum press; in step S50, the temperature during pressing is 210 ℃, the pressing time is 1.5h, and the pressure is 32kg/m2(ii) a As shown in fig. 6, which is a schematic structural diagram of the first composite board 10 and the second composite board 20 after vacuum lamination;
s60, manufacturing a circuit, namely drilling a through hole, chemically depositing copper and electroplating copper on the pressed plate, and etching the circuit 203 on the outer surfaces of the L1 hard plate layer 201 and the L4 hard plate layer 104; as shown in fig. 7, the conductive via 204 formed after drilling penetrates through the L1 hard board layer 201, the L2 hard board layer 202, the L3 hard board layer 103, and the L4 hard board layer 104.
S70, cleaning the silk-screen membrane 30, namely, putting the plate etched in the step S60 into ink removing liquid medicine, and cleaning the silk-screen membrane 30 at the bottom of the step after soaking; in step S70, the temperature of the ink removing liquid medicine is 75 ℃, and the soaking time is 15 min. After the screen printing film 30 is cleaned, the resulting structure is shown in fig. 8.
Referring to fig. 8, the present invention further discloses a step plate, which includes a first composite plate 10 and a second composite plate 20 that are vacuum laminated, in this embodiment, a PP sheet 40 is disposed between the first composite plate 10 and the second composite plate 20, and the first composite plate 10 and the second composite plate 20 are laminated by using a vacuum laminating machine.
Further, the first composite board 10 is composed of a composite L3 hard board layer 103 and an L4 hard board layer 104, the second composite board 20 is composed of a composite L1 hard board layer 201 and an L2 hard board layer 202, and the L2 hard board layer 202 is attached to the L3 hard board layer 103; a circuit is arranged on one surface of the L3 hard board layer 103 facing the second composite board 20, and corrosion-resistant ink is printed on the circuit in a silk-screen mode before the first composite board 10 and the second composite board 20 are pressed in a vacuum mode to form a silk-screen film 30; the positions of the L1 hard board layer 201 and the L2 hard board layer 202 corresponding to the lines of the L3 hard board layer 103 are hollowed out.
In the above embodiment, the upper surface of the L1 hard board layer 201 and the lower surface of the L4 hard board layer 104 both have copper layers, and the circuit is etched; the L1 hard board layer 201, the L2 hard board layer 202, the L3 hard board layer 103 and the L4 hard board layer 104 are provided with a through conductive through hole 204. In addition, the screen printing film 30 is cleaned by using an ink removing liquid medicine to form a stepped hole as shown in fig. 8.
Through the process and the structure, the invention provides the step plate and the manufacturing process thereof, and the process has lower technical threshold requirement, so the cost is lower; due to the existence of the silk-screen film 30, the circuit on the L3 hard board layer 103 cannot be damaged; the screen printing film 30 is cleaned by ink removing liquid medicine, so that the screen printing film 30 is convenient to remove, and when the step depth is deep, the screen printing film is very convenient and fast.
Example 2
Referring to fig. 1, the present invention discloses a manufacturing process of a step plate, in this embodiment, the manufacturing process includes the following steps:
s10, circuit manufacturing of a first composite board 10, wherein the first composite board 10 is composed of an L3 hard board layer 103 and an L4 hard board layer 104 which are compounded, copper layers are respectively arranged on the upper surface of the L3 hard board layer 103 and the lower surface of the L4 hard board layer 104, and circuit manufacturing is carried out on the upper surface of the L3 hard board layer 103; in addition, the method also comprises a process for welding the PAD; referring to fig. 2, a schematic cross-sectional view of the first composite plate 10 in this embodiment is shown;
s20, manufacturing a circuit of a second composite board 20, wherein the second composite board 20 is composed of a composite L1 hard board layer 201 and a composite board
The circuit board is composed of an L2 hard board layer 202, wherein the upper surface of an L1 hard board layer 201 and the lower surface of an L2 hard board layer 202 are both provided with copper layers, and the lower surface of the L2 hard board layer 202 is subjected to circuit manufacturing; in this embodiment, the first composite board 10 in the step S10 and the second composite board 20 in the step S20 are both double-sided copper-clad boards; as shown in fig. 3, which is a schematic cross-sectional view of the second composite board 20;
s30, silk-screen printing of corrosion-resistant ink, namely silk-screen printing of the corrosion-resistant ink on a local position to be protected on the line of the L3 hard board layer 103, forming a silk-screen membrane 30 after high-temperature curing, and then performing browning; in step S30, the temperature of the anti-corrosion ink during curing is 160 ℃, the time is 25min, and the thickness of the formed silk-screen film 30 is 10 μm; as shown in fig. 4, a schematic cross-sectional view of the first composite board 10 with the screen-printed film 30 formed thereon;
s40, manufacturing a hollowed part 106, namely manufacturing the second composite board 20 and the PP sheet 40 into hollowed parts corresponding to the silk-screen position of the first composite board 10 to form the hollowed part 106, and browning the second composite board 20; wherein, the PP sheet 40 is a non-flowing PP, as shown in fig. 5, which is a schematic cross-sectional view of the second composite board 20 and the PP sheet 40 after being hollowed out;
s50, pressing, namely placing the PP sheet 40 between the first composite board 10 and the second composite board 20, attaching the lower surface of the L2 hard board layer 202 and the upper surface of the L3 hard board layer 103 to the PP sheet 40, and pressing in a vacuum press; in step S50, the temperature during pressing is 195 ℃, the pressing time is 2h, and the pressure is 25kg/m2(ii) a As shown in fig. 6, which is a schematic structural diagram of the first composite board 10 and the second composite board 20 after vacuum lamination;
s60, manufacturing a circuit, namely drilling a through hole, chemically depositing copper and electroplating copper on the pressed plate, and etching the circuit on the outer surfaces of the L1 hard plate layer 201 and the L4 hard plate layer 104; as shown in fig. 7, the conductive via 204 formed after drilling penetrates through the L1 hard board layer 201, the L2 hard board layer 202, the L3 hard board layer 103, and the L4 hard board layer 104.
S70, cleaning the silk-screen membrane 30, namely, putting the plate etched in the step S60 into ink removing liquid medicine, and cleaning the silk-screen membrane 30 at the bottom of the step after soaking; in step S70, the temperature of the ink removing liquid medicine is 80 ℃, and the soaking time is 10 min. After the screen printing film 30 is cleaned, the resulting structure is shown in fig. 8.
Referring to fig. 8, the present invention further discloses a step plate, which includes a first composite plate 10 and a second composite plate 20 that are vacuum laminated, in this embodiment, a PP sheet 40 is disposed between the first composite plate 10 and the second composite plate 20, and the first composite plate 10 and the second composite plate 20 are laminated by using a vacuum laminating machine.
Further, the first composite board 10 is composed of a composite L3 hard board layer 103 and an L4 hard board layer 104, the second composite board 20 is composed of a composite L1 hard board layer 201 and an L2 hard board layer 202, and the L2 hard board layer 202 is attached to the L3 hard board layer 103; a circuit is arranged on one surface of the L3 hard board layer 103 facing the second composite board 20, and corrosion-resistant ink is printed on the circuit in a silk-screen mode before the first composite board 10 and the second composite board 20 are pressed in a vacuum mode to form a silk-screen film 30; the positions of the L1 hard board layer 201 and the L2 hard board layer 202 corresponding to the lines of the L3 hard board layer 103 are hollowed out.
In the above embodiment, the upper surface of the L1 hard board layer 201 and the lower surface of the L4 hard board layer 104 both have copper layers, and the circuit is etched; the L1 hard board layer 201, the L2 hard board layer 202, the L3 hard board layer 103 and the L4 hard board layer 104 are provided with a through conductive through hole 204. In addition, the screen printing film 30 is cleaned by using an ink removing liquid medicine to form a stepped hole as shown in fig. 8.
Through the process and the structure, the invention provides the step plate and the manufacturing process thereof, and the process has lower technical threshold requirement, so the cost is lower; due to the existence of the silk-screen film 30, the circuit on the L3 hard board layer 103 cannot be damaged; the screen printing film 30 is cleaned by ink removing liquid medicine, so that the screen printing film 30 is convenient to remove, and when the step depth is deep, the screen printing film is very convenient and fast.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A manufacturing process of a step plate is characterized by comprising the following steps:
s10, circuit manufacturing of a first composite board, wherein the first composite board consists of a composite L3 hard board layer and a composite L4 hard board layer, copper layers are respectively arranged on the upper surface of the L3 hard board layer and the lower surface of the L4 hard board layer, and circuit manufacturing is carried out on the upper surface of the L3 hard board layer;
s20, manufacturing a circuit of a second composite board, wherein the second composite board consists of a L1 hard board layer and an L2 hard board layer which are compounded, copper layers are respectively arranged on the upper surface of the L1 hard board layer and the lower surface of the L2 hard board layer, and the circuit of the lower surface of the L2 hard board layer is manufactured;
s30, silk-screen printing of corrosion-resistant ink, namely silk-screen printing of the corrosion-resistant ink on a local position to be protected on the circuit of the L3 hard board layer, forming a silk-screen film after high-temperature curing, and then performing browning;
s40, manufacturing hollowed parts, namely manufacturing hollowed parts on the second composite board and the PP sheet corresponding to the silk-screen position of the first composite board to form the hollowed parts, and browning the second composite board;
s50, pressing, namely placing the PP sheet between the first composite board and the second composite board, and putting the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer into a vacuum compressor for pressing, wherein the lower surface of the L2 hard board layer and the upper surface of the L3 hard board layer are both attached to the PP sheet;
s60, manufacturing a circuit, namely drilling a through hole, chemically depositing copper and electroplating copper on the pressed plate, and etching the circuit on the outer surfaces of the L1 hard plate layer and the L4 hard plate layer;
and S70, cleaning the silk screen printing film, namely putting the plate etched in the step S60 into ink removing medicinal liquor, and cleaning the silk screen printing film at the bottom of the step after soaking.
2. The process of claim 1, wherein the first composite board of step S10 and the second composite board of step S20 are both double-sided copper clad laminates.
3. The process of claim 1, wherein step S10 further comprises bonding PAD.
4. The step plate manufacturing process of claim 1, wherein in step S30, the temperature of the anti-corrosion ink is 150 ± 10 ℃ and the time is 30 ± 5min, and the thickness of the formed screen printing film is 10-15 μm.
5. The process as claimed in claim 1, wherein in step S50, the pressing temperature is 195-210 ℃, the pressing time is 1.5-2h, and the pressure is 25-32kg/m2。
6. The manufacturing process of the step plate as claimed in claim 1, wherein in step S70, the temperature of the ink-removing liquid medicine is 75-85 ℃ and the soaking time is 10-15 min.
7. A step plate is characterized by comprising a first composite plate and a second composite plate which are subjected to vacuum lamination, wherein the first composite plate consists of a composite L3 hard plate layer and a composite L4 hard plate layer, the second composite plate consists of a composite L1 hard plate layer and a composite L2 hard plate layer, and the composite L2 hard plate layer is attached to the composite L3 hard plate layer;
a circuit is arranged on one surface, facing the second composite board, of the L3 hard board layer, and anti-corrosion ink is printed on the circuit in a silk screen mode before the first composite board and the second composite board are subjected to vacuum lamination to form a silk screen printing film; the positions of the L1 hard board layer and the L2 hard board layer corresponding to the lines of the L3 hard board layer are hollowed out.
8. The step plate as claimed in claim 7, wherein said L1 hard plate layer has a copper layer on its upper surface and said L4 hard plate layer has a copper layer on its lower surface, and said traces are etched; and the L1 hard board layer, the L2 hard board layer, the L3 hard board layer and the L4 hard board layer are provided with through conductive through holes.
9. The step plate as claimed in claim 7, wherein said screen printing film is cleaned with an ink-removing solution.
10. The step plate as claimed in claim 7, wherein a PP sheet is disposed between the first composite plate and the second composite plate, and the first composite plate and the second composite plate are laminated by using a vacuum laminating machine.
CN202011463691.0A 2020-12-11 2020-12-11 Step plate and manufacturing process thereof Pending CN112584609A (en)

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Application Number Priority Date Filing Date Title
CN202011463691.0A CN112584609A (en) 2020-12-11 2020-12-11 Step plate and manufacturing process thereof

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Application Number Priority Date Filing Date Title
CN202011463691.0A CN112584609A (en) 2020-12-11 2020-12-11 Step plate and manufacturing process thereof

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CN202011463691.0A Pending CN112584609A (en) 2020-12-11 2020-12-11 Step plate and manufacturing process thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114466522A (en) * 2022-02-14 2022-05-10 湖北龙腾电子科技股份有限公司 White oil block circuit board pressing structure and manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114466522A (en) * 2022-02-14 2022-05-10 湖北龙腾电子科技股份有限公司 White oil block circuit board pressing structure and manufacturing method

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