JPH03243338A - Manufacture of metallic body and ceramic composite copper-clad laminate using same - Google Patents

Abstract

PURPOSE:To develop a metallic body substituting for an intermediate board by making use of characteristics of a ceramic layer, and prevent the occurrence of the cause of defects due to scattered powders by fitting and integrating two sheets of copper foil mutually via an adhesive agent by directing each luster surface to the inside thereof, and forming ceramic layers on the outside surfaces thereof. CONSTITUTION:For instance, an aluminum sheet is employed as an intermediate body 4 being in the middle of an adhesive agent layer 2 held by two sheets of copper foil 1. The adhesive agent layer 2 is placed around only the periphery of the aluminum sheet 4. The periphery of the rigid aluminum sheet is applied with an adhesive agent in its both surfaces. Furthermore, the both surfaces of the aluminum sheet are integrated in the form of directing the luster surface of the copper surfaces to the inside. An alumina layer is formed on one surface by plasma flame coating and, on the other surface, an alumina layer is formed similarly so as to make a metallic body. Between press heat plates, a metallic body 6 is mounted on a stainless end plate 7, and three sheets of prepregs obtained by infiltrating, and then drying, epoxy resin into a fiber base material are laid thereon, and this constitution is repeated ten times, and finally, a stainless end plate 7 is mounted thereon in order to obtain a whole constitution. By heating and pressing this and then cutting the periphery by means of a shear, thereby obtaining a ceramic composite copper-clad laminate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a metal body replacing a conventional intermediate plate and a method for manufacturing a ceramic composite plate using the metal body.

[Conventional technology]

Generally, in the production of copper-clad laminates, a predetermined number of pre-preg sheets obtained by impregnating and drying an extremely short base material with handle oil are rolled, and then copper foil is laid on the outer layer on both sides of the pre-preg sheets, which are then heated and pressed. Depends on the method of molding. In stiff molding, the above! It is common practice to alternately stack S and hard intermediate plates and heat and press them. ○ These intermediate plates are subject to surface stains, side grease slippage, and scratches during use, so they must be cleaned regularly. This cleaning VC should not be washed or polished.

High-pressure water washing and brush polishing are usually performed using a large automatic cleaning device. Intermediate plate material lJ! Stainless steel, iron, aluminum, etc. are used for i, but stainless steel gold, which has the characteristics of low elongation and hardness, is usually used.

Additionally, a special laminate called a ceramic multi-layer laminate has been developed. Improved heat dissipation compared to conventional side laminates,
Large demand is expected because the coefficient of linear expansion is small and large substrates can be formed at a lower cost than so-called ceramic substrates. You need to use a board.

[Problem to be solved by the invention]

Although it is common to use stainless steel intermediate plates in laminated molding, they have major disadvantages such as being heavy, difficult to handle, and high maintenance costs. In addition, with the automatic cleaning equipment mentioned above, it is difficult to clean different sizes (Q).For example, in low-volume, high-mix production, it is necessary to prepare several types of intermediate plates of different sizes; In addition, in the intermediate cleaning power type, cleaning of the intermediate plate surface is insufficient, and the surface of the formed laminated plate σ is not clean due to dust entering between the intermediate plate and the steel foil gap. Scratches, dents, etc. occur, making the product unusable.

Also, we are involved in the production of ceramic composite horizontal no. 820.

The ceramic layer σ is formed to produce high quality images, which is 1.5 to 4 times larger than conventional laminates.

In order to cut out the entire ceramic layer on the surface of the metal foil, the ceramic is coated with a plasma solvent, but if the ceramic powder is stained with gold pA! The layer is scattered on the surface and the surface becomes dirty, causing defects similar to those in conventional laminate manufacturing.

The present invention provides the following features in the production of ceramic-associated copper-clad laminates:
We have abolished the use of a stainless steel intermediate plate, which has a big problem with the conventional method, and have developed a metal body to replace the intermediate plate by utilizing the percent properties of the ceramic layer.We have also developed a ceramic material that does not cause defects due to scattered powder. The purpose of the present invention is to provide a method for manufacturing composite steel laminates.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention, in the production of ceramic-coated copper-clad laminates, integrates each glossy surface of two sheets of steel foil with an adhesive, and ceramic Create a layered metal body.

Next, the metal bodies and a predetermined number of prepregs are alternately stacked and heated and press-formed between presses.The metal bodies are then disassembled to obtain a steel laminate.

The metal body of the present invention will be explained in more detail in FIG. In FIG. 2, the intermediate material 4 is inserted into the 20 layers of adhesive shown in FIG. 1.

The intermediate body 4 is a resin film or a metal machine such as aluminum sand.

The N-contacting agent used for the metal body may be a thermosetting resin or a heat-resistant resin, as long as it has an adhesive strength that allows the steel foil to peel off at room temperature.

When using a resin film for the intermediate body 4, when it is disassembled after press molding, the adhesive remains on the film and is attached to the steel, so there is no need to clean the copper foil surface. The film material is a thermosetting resin, such as a polyimide resin, or a thermofusible resin, such as polyether sulfone, polyarylate, etc., which is desired to be softened and melted at high temperatures. The temperature is determined by the temperature, for example, 180 to 190°C or higher in the production of epoxy thread steel clad laminates.

When gold (Me) is used for the intermediate body 4, as an example, an aluminum plate coated with gold as a coating agent on both sides is sandwiched between steel foils, but the softening m! @Temperature 0) Limit is fx <, reuse is possible ℃ 0 Also, the molding pressure can be increased. The metal wood can be made of aluminum, stainless steel, copper, etc., but the selection is based on price and ease of work.

The type of metal used for the metal body of the present invention is electrolytic copper foil, rolled steel foil, aluminum foil, stainless steel mi, nickel foil, etc., and the thickness is determined depending on the purpose.

To form the ceramic layer, ceramic powder, such as alumina powder, is deposited on the surface of the metal foil using a plasma method.

Next, as shown in FIG. 3, the metal body 5 and a predetermined number of prepreg layers 6 are alternately stacked so that the stainless steel end plate 7 is in contact with the metal body at the upper and lower ends.

Place the whole thing between the top and bottom of the press and apply 2XII hot pressure.
After that, the metal body is dismantled to obtain a ceramic association copper clad laminate.

When heating and pressurizing with a press, the results are better if a two-stage pressurization method is used, and better results are obtained if the entire press is heated and pressurized in a vacuum atmosphere. For two-stage pressurization, the initial pressure is 4 to 15
) cg/all+, 2nd stage t15-40kg/a! I+
However, for the preferred fL<, the initial pressure is 5 to 10 kg/m, and the second stage t20 to 25 kg/a! T is cute. Further, when a vacuum atmosphere is used, the degree of vacuum needs to be 70Qao+Hg or more.

[Effect]

According to the present invention, a metal body in which a ceramic layer is formed by applying a layer of steel to a metal body using a bonding agent can replace the intermediate plate even if the conventional σ) stainless steel plate is desired to be used. Demonstrate one's abilities.

In addition, since the metal body has two sheets of steel and each shiny surface is on the inside,
Dust and ceramic layer type 5y scattered before Breathe 8
Ceramic powder, which sometimes scatters, is also difficult to adhere to the shiny surface of the steel foil and may cause defects.

When dismantling the metal body after press forming, the adhesive should stain the surface of the steel foil remaining on the film or metal plate intermediate I]I]VC. If gold J@sand is used as the intermediate, it can be reused.

The reason for using two stages of pressure in heating and pressing is that if the initial pressure is low, there will be no erosion and the surface roughness of the steel foil will be as small as 5 μm or less. In addition, if it is carried out in a full atmosphere, it will eliminate the lack of pressure when the pressure is low, and the bubbles and volatile components inside the coated fabric will be able to pass through smoothly. In this embodiment, the metal body σ shown in the second example is shown as gold.

2 sheets 0) @ Adhesive layer sandwiched between foils 1 2σ) Intermediate 4 gold aluminum plate in the middle 0 and above 0 adhesive layer/m 2
is at the peripheral part of the aluminum plate 40. Next, we will describe an example of manufacturing warp. O The peripheral part of the hard aluminum plate (Tokai Kinzoku Co., Ltd.) 530 x 530 mm has a width of 05 mm. Diabond TP300 is used as the bonding agent.
(manufactured by Nosawa Chemical) was coated with VC on both sides.Furthermore, it was integrated with a glossy surface of 18μm thick copper (made in Japan!) by plasma spraying on one side. An alumina layer of 50 μm't'' was formed, and then Algus J- was formed on the other layers in the same way (see Japanese Patent Application Laid-Open No. 65-219562.%, No. 63-178042).
, a metal body.

Next, between press hot plates, as shown in Fig. 3, gold M 6 was placed on stainless steel 7, and then Epoquin resin was impregnated into the female fiber base material [Q obtained by drying]. , 3 sheets of 2a+m thick prepreg GEA-67N (Hitachi Kashusha),
This picking was repeated 10 times and finally the stainless steel end plate 7 was placed to obtain all the components. This 7″L is heated to a temperature of 170°C and an initial pressure of 5.
kg/a! 11. The product was heated and pressed at a pressure of 15 kg/ar in the second stage, and then cut with a peripheral wire to obtain a ceramic composite wire layer.

Surface roughness of the above laminate board a, average 5μm, IT size 7°6μ
It was m. Moreover, - the film properties satisfied the JIS and NEMA standards. Furthermore, workability is much better than before,
There are almost no scratches or dents on the steel foil surface. a! The manufacturing cost is 20% lower than that of ceramic composite steel laminates made using conventional methods.
~30% cheaper.

(Example 2) %15501n+1 steel 1ea-ru lNi55 Q
m thickness 10100u sesame film roll (Nisspec S
+Sumitomo Chemical? 1:) and Easterbond A-1000 (Shoei Chemical Co., Ltd.) was used as an adhesive. In FIG. 4, the adhesive is applied to both sides of the flank film 110 using a coating roll 12, and then steel W3 is pasted on both sides (8) using a foil roll 9, and then 0) it is crimped using a post-pressure roll 10. Then, the entire ceramic layer was formed using a 1fiK alumina bath gun 16 to obtain a metal body 5. A ceramic composite steel clad laminate was obtained in the same manner as in Example 1.

The surface thickness of the obtained laminated sheet Ifi#i was 4.3 μm on average, and 2 μm at maximum.
Satisfied MA standards. Furthermore, the workability was much better than that of the conventional method, and there were almost no dents on the steel foil.

The manufacturing cost was 40 to 50% lower than that of conventional ceramic composite steel clad laminates.

(By a conventional method, a steel foil with a ceramic layer formed thereon is placed on a stainless steel hard plate, three sheets of prepreg with a thickness of [L2−] are stacked on top of the sled, and a stainless steel hard plate is stacked on top of the sled.

This process was repeated 10 times in total, and the entire structure was put into a press, heated and pressed in the same manner as in Example 1, and then disassembled to form a ceramic composite fI.
A s Zhanghuan laminate was obtained.

The surface roughness of the obtained laminate was 5 μm on average, ilk large & 5 μm.
In the conventional method, scratches and dents were completely generated on the surface of the steel foil. Also, since stainless steel Yume-ita is used as the intermediate plate, as mentioned above, it is necessary to clean the Kasuri-kasuri board surface rIiJ.
In addition, very poor results were obtained in terms of cropping properties.

[Invention effect]

It is clear from the results of Examples 1+'I11 and 2 according to the present invention and the comparative examples that the metal body of the present invention functioned satisfactorily in place of the conventional stainless steel placing plate (intermediate plate).

What's more, the metal body was disassembled by heating and pressurizing, and the surface of the foil was revealed as III! There is no dust or anti-slip powder, so
Kiss, hit at - I want to happen.

This T1. On the contrary, comparative example "'C" by the conventional method
All dents occurred.

Also, as a matter of course, there is a great advantage that the uninvented method does not solve the various problems associated with contamination of the stainless steel intermediate plate and its cleaning in the conventional method.

[Brief explanation of drawings]

FIG. 1 shows an example of a gradient metal body of the present invention, FIG. 2 shows an example of a metal body having an O intermediate of the present invention, and FIG. 3 shows a metal body and a burble grid! l
Example II and Example 4 are examples of manufacturing a metal body using a film as an intermediate according to the present invention. 1... Steel foil, 2... Adhesive layer. 3...Ceramic layer, 4...Intermediate. 6...Prepreg, 5...Metal body. 7...Stainless steel foundation, 8...Copper foil roll, 9...Crimping roll, 10...
・Side fat fin, 11... Adhesive application a-ru,
12...Alumina spray gun.

Claims (3)

[Claims] 1. A metal body made by integrating two pieces of copper foil with each glossy side facing inside using an adhesive, and forming ceramic layers on both outer sides. 2. The metal body according to claim 1, wherein an intermediate is provided in the adhesive layer between the two copper foils. 3. A ceramic using the metal body according to claim 1 or 2, characterized in that a plurality of sets of a metal body and a predetermined number of prepregs are stacked alternately are heated and pressed by a press, and then the metal body is dismantled. A method for manufacturing composite copper-clad laminates.