CN114990551A - Manufacturing method of lightweight metal folding screen lining plate - Google Patents
Manufacturing method of lightweight metal folding screen lining plate Download PDFInfo
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- CN114990551A CN114990551A CN202210656274.0A CN202210656274A CN114990551A CN 114990551 A CN114990551 A CN 114990551A CN 202210656274 A CN202210656274 A CN 202210656274A CN 114990551 A CN114990551 A CN 114990551A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/28—Acidic compositions for etching iron group metals
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/26—Acidic compositions for etching refractory metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the field of metal processing, in particular to a method for manufacturing a lightweight metal folding screen lining plate, which comprises the following steps that firstly, a metal matrix is subjected to composite forming processing, a pure titanium or stainless steel sheet is subjected to mechanical punching, the width of an etching hinge is reserved in the middle of the sheet, the surface of the obtained metal sheet is chemically cleaned to remove stains, an aluminum-magnesium alloy is subjected to surface cleaning, surface oil stains are removed for later use, the aluminum metal sheet is compounded with the two sides of the titanium metal sheet or the stainless steel sheet, the aluminum-magnesium alloy on the two sides is adopted, the titanium metal sheet or the stainless steel sheet in the middle interlayer is the width of a part to be etched, the titanium-aluminum composite metal sheet is obtained after compounding, a hot rolling process is adopted for rolling, stress removal annealing is carried out after the rolling is finished, and a leveling process is carried out after the annealing; secondly, etching and processing the surface of the metal matrix; thirdly, flow channel etching is carried out on the stainless steel or titanium metal part; and fourthly, carrying out surface copper plating treatment on the etched metal substrate.
Description
Technical Field
The invention relates to the field of metal processing, in particular to a manufacturing method of a light-weight metal folding screen lining plate.
Background
With the development of the technology, a flexible folding screen mobile phone comes along, and in order to enhance the heat dissipation capability of the mobile phone and support a flexible screen, a metal lining plate is usually used in the mobile phone to support the screen and conduct heat.
The metal welt that current flexible screen folding mobile phone was used adopts pure copper material or stainless steel material more, and pure copper material and stainless steel material's metal welt intensity and heat conductivity are all better, can support flexible screen panel effectively, conduct the produced heat of screen when carrying out the work.
The metal lining plate for the existing flexible screen folding mobile phone is mostly made of pure copper or stainless steel, the density of the metal lining plate made of pure copper is high, so that the weight of the metal lining plate is high, the weight of the mobile phone is heavy, the mobile phone is uncomfortable in daily use and carrying, and the metal lining plate made of stainless steel has magnetism and can possibly interfere electronic elements in the mobile phone; therefore, a method for manufacturing a lightweight metal folding screen lining plate is provided to solve the above problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the metal lining plate for the existing flexible screen folding mobile phone is made of pure copper materials or stainless steel materials mostly, the density of the metal lining plate made of pure copper materials is high, the weight of the metal lining plate is further high, the mobile phone is heavy and is uncomfortable in daily use and carrying, and the metal lining plate made of stainless steel materials has magnetism and can possibly interfere with electronic elements in the mobile phone.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a manufacturing method of a lightweight metal folding screen lining plate, which comprises the following steps:
s1: carrying out composite forming processing on a metal matrix;
s2: etching and processing the surface of the metal matrix;
s3: etching a flow channel on a stainless steel or titanium metal part;
s4: and carrying out surface copper plating treatment on the etched metal substrate.
Preferably, the metal matrix in S1 is a magnesium-aluminum metal and titanium or stainless steel composite metal plate.
Preferably, the step S1 is specifically as follows:
a1: mechanically punching a pure titanium or stainless steel sheet, reserving the width of an etching hinge in the middle of the sheet, and chemically cleaning the surface of the obtained metal plate to remove stains;
a2: cleaning the surface of the aluminum-magnesium alloy, and removing oil stains on the surface for later use;
a3: compounding the aluminum metal plate and two sides of the titanium metal plate or the stainless steel plate, adopting aluminum-magnesium alloy on two sides, and rolling after compounding to obtain a titanium-aluminum composite metal sheet, wherein the titanium metal plate or the stainless steel plate in the middle interlayer is the width of a part to be etched, and the thickness of the obtained composite sheet is 0.1-0.15 mm;
a4: rolling by adopting a hot rolling process, wherein the rolling temperature is 450-500 ℃, after the rolling is finished, stress relief annealing is carried out at 480 ℃, and after the annealing, a leveling procedure is carried out.
Preferably, the thickness of the pure titanium or stainless steel sheet in A1 is 0.1-0.15mm, the hole diameter during punching is 1-5mm, and the gap between holes is 5-10 mm.
Preferably, in a1, the surface of the pure titanium or stainless steel sheet is chemically cleaned and then pre-etched, the stainless steel is pre-etched with hydrochloric acid, and the titanium is pre-etched with ammonium bifluoride, so as to obtain an activated metal, and the surface of the metal is cleaned.
Preferably, the aluminum magnesium alloy in A2 is commercial 5-series aluminum magnesium alloy, the strength requirement is above 280MPa, the elongation is more than 8%, the magnesium content is more than 5%, and the plate thickness is above 0.2 mm.
Preferably, the step S3 is specifically as follows:
b1: the workpiece is subjected to oil removal, acid washing, water washing and drying, and then is subjected to photosensitive ink roll coating and drying treatment in a tunnel furnace;
b2: putting the workpiece processed in the last step into an etching machine, determining etching parameters (the pressure is 1.5-3kg, the temperature is 35-50 ℃, and the spraying time is 5-10min), and then carrying out batch spraying etching;
b3: injecting the etching solution into an etching machine;
b4: and cleaning and drying after film stripping treatment, and measuring the etching precision on a quadratic element detector.
Preferably, 2-5% of silane is added into the ink in B1 to serve as a coupling agent so as to improve the adhesion and avoid the corrosion of aluminum magnesium parts caused by falling off.
Preferably, the formula of the etching solution in B3 is specifically as follows: the main components of the stainless steel etching solution are the traditional etching solution formula (ferric trichloride, phosphoric acid and nitric acid), but the stainless steel etching solution is added with a complexing agent, and the complexing agent comprises sodium carbonate (2-5g/L), sodium gluconate (1-3g/L) and N-methyl pyrrolidone (4-6g/L)
The titanium etching solution comprises 8-15 wt% of ammonium bifluoride, 12-20 wt% of ammonium chloride, 6-12 wt% of phosphoric acid and the balance of purified water, and the complexing agent comprises 1-3g/L of sodium gluconate and 5-8g/L of polyacrylamide.
The invention has the advantages that:
1. according to the invention, through the step of S1-4, the processed metal lining plate has light weight and good thermal conductivity, and the metal lining plate has no magnetism and cannot interfere with electronic elements in the mobile phone, so that the problems that the metal lining plate for the existing flexible screen folding mobile phone is made of pure copper materials or stainless steel materials mostly, the density of the metal lining plate made of pure copper materials is high, the weight of the metal lining plate is large, the mobile phone is heavy and is uncomfortable in daily use and carrying, and the metal lining plate made of stainless steel materials has magnetism and can interfere with the electronic elements in the mobile phone are solved, and the etched lines are smooth and the side etching is small by using a special etching solution formula.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall process flow architecture of the present invention;
FIG. 2 is a schematic diagram of a detailed flow structure of S1 according to the present invention;
fig. 3 is a schematic diagram of a specific flow structure of S3 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-3, a method for manufacturing a lightweight metal folding screen lining plate includes the following steps:
s1: carrying out composite forming processing on a metal matrix;
s2: etching and processing the surface of the metal matrix;
s3: etching a flow channel on a stainless steel or titanium metal part;
s4: the etched metal substrate is subjected to surface copper plating treatment, the conductivity of the lining plate can be improved by the surface copper plating, the current gold plating treatment process is replaced, and the information transmission between the integral substrate and the flexible screen is improved by the copper plating of key parts;
when the folding metal screen lining plate works, the folding metal screen lining plate with long folding service life and light weight is formed by the process.
Further, the metal matrix in S1 is a magnesium-aluminum metal and titanium or stainless steel composite metal plate.
Further, the step S1 is specifically as follows:
a1: mechanically punching a pure titanium or stainless steel sheet, reserving the width of an etching hinge in the middle of the sheet, and chemically cleaning the surface of the obtained metal plate to remove stains;
a2: cleaning the surface of the aluminum-magnesium alloy, and removing oil stains on the surface for later use;
a3: compounding the aluminum metal plate and two sides of the titanium metal plate or the stainless steel plate, adopting aluminum-magnesium alloy on two sides, and rolling after compounding to obtain a titanium-aluminum composite metal sheet, wherein the titanium metal plate or the stainless steel plate in the middle interlayer is the width of a part to be etched, and the thickness of the obtained composite sheet is 0.1-0.15 mm;
a4: and rolling by adopting a hot rolling process, wherein the rolling temperature is 450-500 ℃, after the rolling is finished, stress relief annealing is carried out at 480 ℃, and after the annealing, a leveling procedure is carried out.
Furthermore, the thickness of the pure titanium or stainless steel sheet in the A1 is 0.1-0.15mm, the aperture size during punching is 1-5mm, and the gap between the holes is 5-10 mm.
Further, in the a1, the surface of the pure titanium or stainless steel sheet is chemically cleaned and then pre-etched, the stainless steel is pre-etched with hydrochloric acid, and the titanium is pre-etched with ammonium bifluoride, so that an activated metal is obtained, and then the surface of the metal is cleaned.
Further, the aluminum magnesium alloy in A2 adopts commercial 5-series aluminum magnesium alloy, the strength requirement is more than 280MPa, the elongation is more than 8%, the magnesium content is more than 5%, and the plate thickness is more than 0.2 mm.
Further, the step S3 is specifically as follows:
b1: the workpiece is subjected to oil removal, acid washing, water washing and drying, and then is subjected to photosensitive ink roll coating and drying treatment in a tunnel furnace;
b2: putting the workpiece processed in the last step into an etching machine, determining etching parameters (the pressure is 1.5-3kg, the temperature is 35-50 ℃, and the spraying time is 5-10min), and then carrying out batch spraying etching;
b3: injecting the etching solution into an etching machine;
b4: and cleaning and drying after film stripping treatment, and measuring the etching precision on a quadratic element detector.
Furthermore, 2-5% of silane is added into the ink in B1 to serve as a coupling agent to improve the adhesive force and avoid corrosion of aluminum and magnesium parts caused by falling.
Further, the formula of the etching solution in B3 is specifically as follows: the main components of the stainless steel etching solution are a traditional etching solution formula (ferric trichloride, phosphoric acid and nitric acid), but a complexing agent is added into the stainless steel etching solution formula, the components of the complexing agent are sodium carbonate (2-5g/L), sodium gluconate (1-3g/L) and N-methylpyrrolidone (4-6g/L), and the added complexing agent has the effect of preventing lateral erosion;
the titanium etching solution comprises 8-15 wt% of ammonium bifluoride, 12-20 wt% of ammonium chloride, 6-12 wt% of phosphoric acid and the balance of purified water, and the complexing agent comprises 1-3g/L of sodium gluconate and 5-8g/L of polyacrylamide.
The working principle is as follows: firstly, carrying out composite forming processing on a metal matrix, mechanically punching a pure titanium or stainless steel thin plate, reserving an etching hinge width in the middle of the thin plate, carrying out chemical cleaning on the surface of the obtained metal plate to remove stains, carrying out surface cleaning on aluminum-magnesium alloy, removing surface oil stains for later use, compounding the aluminum metal plate and two sides of the titanium metal plate or the stainless steel plate, adopting aluminum-magnesium alloy on two sides, rolling the titanium metal plate or the stainless steel plate with an intermediate interlayer at the width of a part to be etched, obtaining the titanium-aluminum composite metal thin plate after compounding, finally obtaining the thickness of the composite plate material of 0.1-0.15mm, rolling the titanium-aluminum composite metal thin plate by adopting a hot rolling process, wherein the rolling temperature is 450-500 ℃, carrying out stress relief annealing at 480 ℃ after the rolling is finished, and carrying out a leveling process after the annealing; secondly, etching and processing the surface of the metal matrix; thirdly, flow channel etching is carried out on the stainless steel or titanium metal part; and fourthly, carrying out surface copper plating treatment on the etched metal substrate.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (9)
1. A manufacturing method of a lightweight metal folding screen lining plate is characterized by comprising the following steps: the manufacturing method comprises the following steps:
s1: carrying out composite forming processing on a metal matrix;
s2: etching and processing the surface of the metal matrix;
s3: etching a flow channel on a stainless steel or titanium metal part;
s4: and carrying out surface copper plating treatment on the etched metal substrate.
2. The manufacturing method of the light-weight metal folding screen lining plate according to claim 1, wherein the manufacturing method comprises the following steps: the metal matrix in the S1 is a magnesium-aluminum metal and titanium or stainless steel composite metal plate.
3. The manufacturing method of the light-weight metal folding screen lining plate according to claim 2, wherein the manufacturing method comprises the following steps: the step S1 specifically includes the following steps:
a1: mechanically punching a pure titanium or stainless steel sheet, reserving the width of an etching hinge in the middle of the sheet, and chemically cleaning the surface of the obtained metal plate to remove stains;
a2: cleaning the surface of the aluminum-magnesium alloy, and removing oil stains on the surface for later use;
a3: compounding the aluminum metal plate and two sides of the titanium metal plate or the stainless steel plate, adopting aluminum-magnesium alloy on two sides, and rolling after compounding to obtain a titanium-aluminum composite metal sheet, wherein the titanium metal plate or the stainless steel plate in the middle interlayer is the width of a part to be etched, and the thickness of the obtained composite sheet is 0.1-0.15 mm;
a4: and rolling by adopting a hot rolling process, wherein the rolling temperature is 450-500 ℃, after the rolling is finished, stress relief annealing is carried out at 480 ℃, and after the annealing, a leveling procedure is carried out.
4. The manufacturing method of the light-weight metal folding screen lining plate according to claim 3, wherein the manufacturing method comprises the following steps: the thickness of the pure titanium or stainless steel sheet in the A1 is 0.1-0.15mm, the aperture size during punching is 1-5mm, and the gap between the holes is 5-10 mm.
5. The method for manufacturing a lightweight metal folding screen lining plate as claimed in claim 4, wherein: in the step A1, the surface of a pure titanium or stainless steel sheet is chemically cleaned and then pre-eroded, the stainless steel is pre-eroded by hydrochloric acid, the titanium is pre-eroded by ammonium bifluoride, activated metal is obtained, and the surface of the metal is cleaned.
6. The method for manufacturing a lightweight metal folding screen lining plate as claimed in claim 5, wherein: the aluminum magnesium alloy in the A2 adopts commercial 5-series aluminum magnesium alloy, the strength requirement is more than 280MPa, the elongation is more than 8%, the magnesium content is more than 5%, and the thickness of a plate is more than 0.2 mm.
7. The manufacturing method of the light-weight metal folding screen lining plate according to claim 6, wherein the manufacturing method comprises the following steps: the step S3 specifically includes the following steps:
b1: the workpiece is subjected to oil removal, acid washing, water washing and drying, and then is subjected to photosensitive ink roll coating and drying treatment in a tunnel furnace;
b2: putting the workpiece processed in the last step into an etching machine, determining etching parameters (pressure of 1.5-3kg, temperature of 35-50 ℃, and spraying time of 5-10min), and then carrying out batch spray etching;
b3: injecting the etching solution into an etching machine;
b4: and cleaning and drying after film stripping treatment, and measuring the etching precision on a quadratic element detector.
8. The method for manufacturing a lightweight metal folding screen lining plate as claimed in claim 7, wherein: 2-5% of silane is added into the ink in B1 to be used as a coupling agent so as to improve the adhesive force and avoid the corrosion of the aluminum-magnesium part caused by falling off.
9. The method for manufacturing a lightweight metal folding screen lining plate as claimed in claim 8, wherein: the formula of the etching solution in B3 is specifically as follows: the main components of the stainless steel etching solution are a traditional etching solution formula (ferric trichloride, phosphoric acid and nitric acid), but a complexing agent is added, and the complexing agent comprises 2-5g/L of sodium carbonate, 1-3g/L of sodium gluconate and 4-6g/L of N-methylpyrrolidone;
the titanium etching solution comprises 8-15 wt% of ammonium bifluoride, 12-20 wt% of ammonium chloride, 6-12 wt% of phosphoric acid and the balance of purified water, and the complexing agent comprises 1-3g/L of sodium gluconate and 5-8g/L of polyacrylamide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210656274.0A CN114990551A (en) | 2022-06-10 | 2022-06-10 | Manufacturing method of lightweight metal folding screen lining plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210656274.0A CN114990551A (en) | 2022-06-10 | 2022-06-10 | Manufacturing method of lightweight metal folding screen lining plate |
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| CN114990551A true CN114990551A (en) | 2022-09-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176345A (en) * | 2019-07-03 | 2021-01-05 | 奥特斯奥地利科技与***技术有限公司 | Etching composition, etching method, conductor trace and component carrier |
| CN113969403A (en) * | 2021-10-27 | 2022-01-25 | 湖南工程学院 | Etching solution and method for nickel and titanium high-temperature alloy |
| KR20220028609A (en) * | 2020-08-31 | 2022-03-08 | 주식회사 아모그린텍 | Folding plate and manufacturing method thereof |
| CN114257668A (en) * | 2020-09-25 | 2022-03-29 | 华为技术有限公司 | Composite support component, preparation method thereof and folding terminal |
| CN216353073U (en) * | 2021-05-18 | 2022-04-19 | 华为技术有限公司 | Flexible screen support piece, flexible screen module and electronic equipment |
-
2022
- 2022-06-10 CN CN202210656274.0A patent/CN114990551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176345A (en) * | 2019-07-03 | 2021-01-05 | 奥特斯奥地利科技与***技术有限公司 | Etching composition, etching method, conductor trace and component carrier |
| KR20220028609A (en) * | 2020-08-31 | 2022-03-08 | 주식회사 아모그린텍 | Folding plate and manufacturing method thereof |
| CN114257668A (en) * | 2020-09-25 | 2022-03-29 | 华为技术有限公司 | Composite support component, preparation method thereof and folding terminal |
| CN216353073U (en) * | 2021-05-18 | 2022-04-19 | 华为技术有限公司 | Flexible screen support piece, flexible screen module and electronic equipment |
| CN113969403A (en) * | 2021-10-27 | 2022-01-25 | 湖南工程学院 | Etching solution and method for nickel and titanium high-temperature alloy |
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| 曾广根等: "《电子封装材料与技术：芯片制作、互连及封装》", vol. 1, 国防工业出版社, pages: 137 - 138 * |
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