JP2017170806A - Composite body of metallic member and resin mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite body of a metallic member and a resin mold realizing excellent adhesion between a metal and a resin even in a high temperature use environment and capable of exhibiting high airtightness.SOLUTION: Provided is a composite body 1 comprising: a planar metallic member provided with the first main surface and the second main surface located in the side opposite to the first main surface; and a resin mold burying at least a part of the metallic member, the metallic member has a penetration part penetrating in a sheet thickness direction, and the penetration part has a connection resin part connecting the resin parts of the resin mold located on the first and second main surfaces at the inside thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite of a metal member and a resin mold used for electronic devices, home appliances, vehicle parts, vehicle-mounted products, and the like.

  With the rapid development of various industries such as electronics and automobiles, the diversification of materials and the advancement of functions are progressing. In particular, parts that efficiently combine dissimilar materials of resin and metal are lighter and free to design. The demand is increasing from the viewpoint of improvement of cost and cost reduction.

  In general, it is difficult to increase the adhesiveness of the joints with members made of dissimilar materials. For example, in a semiconductor package structure in which the base material is molded with resin, the adhesion between the resin and the metal is particularly insufficient at high temperatures. There are problems such as resin cracks and chip peeling due to the difference in thermal expansion coefficient between the resin and the lead frame (metal) and the expansion of moisture in the package.

  In order to solve the above problems, in Patent Documents 1 to 3, the surface of the metal member is roughened, and in particular, unevenness is formed in the joint portion with a different material, thereby improving the adhesion at the joint portion. Has been proposed.

JP-A-10-294024 JP 2010-167475 A JP 2013-111181 A

  However, in the conventional molding method of a composite of a metal member and a resin mold, the adhesion strength between the metal and the resin is particularly insufficient at a high temperature, and molecules such as water vapor clusters permeate from the joint interface between the metal and the resin. There was a risk that the internal functional parts would deteriorate.

  Therefore, the present invention has been made in view of the above problems, and particularly a metal member that realizes excellent adhesion between a metal and a resin and can exhibit high airtightness even under a high temperature use environment. It aims at providing the composite_body | complex with a resin mold.

  As a result of intensive studies, the present inventors have found that the metal member has a through portion that penetrates in the plate thickness direction, and this through portion is located on the first and second main surfaces inside the resin mold. By having the connecting resin part that connects the resin parts to each other, even under high temperature use environment, it achieves excellent adhesion between the metal and the resin, and the metal member and the resin mold that can exhibit high airtightness The present inventors have found that a complex can be obtained and have completed the present invention.

That is, the gist configuration of the present invention is as follows.
[1] A plate-shaped metal member comprising a first main surface and a second main surface located on the opposite side of the first main surface;
A resin mold that embeds at least a part of the metal member,
The metal member has a penetrating portion that penetrates in the plate thickness direction,
The penetration part has a connecting resin part for connecting the resin parts of the resin mold located on the first and second main surfaces in the inside thereof, and is a composite of a metal member and a resin mold body.
[2] The composite of the metal member and the resin mold according to [1], wherein the through part is at least one of a through hole and a notch part.
[3] The composite of the metal member and the resin mold according to [2], wherein the through portion is at least a through hole.
[4] The composite of the metal member and the resin mold according to [2] or [3], wherein the diameter of the through hole is 100 μm or more.
[5] The metal member and the resin mold according to any one of [2] to [4], wherein the diameter of the through hole is different between the first main surface and the second main surface. Complex with.
[6] The metal member and the resin mold according to any one of [2] to [5], wherein the through hole includes a substantially trapezoidal shape in a cross section when viewed in a cross section in the plate thickness direction of the metal member. Complex with.
[7] The composite of the metal member and the resin mold according to [6], wherein the substantially trapezoidal shape has a taper angle of 15 ° or more.
[8] The composite further includes a functional component on the first main surface of the metal member inside the resin mold,
The composite of the metal member and the resin mold according to any one of [5] to [7], wherein the diameter of the through hole is larger on the second main surface than on the first main surface. .
[9] The metal member according to [8], wherein a ratio of an area of the through hole on the second main surface to an area of the through hole on the first main surface is 1.5 to 100. Composite with resin mold.
[10] The metal member has two or more through portions at a joint portion with the resin mold,
In any one of said [1]-[9] whose maximum value is 20 mm or less among the distances from one said penetration part to another said nearest penetration part in each of said penetration part. A composite of the described metal member and a resin mold.

  The present invention has succeeded in providing a composite of a metal member and a resin mold that realizes excellent adhesion between a metal and a resin, even under a high temperature use environment, and can exhibit high airtightness. .

FIG. 1 is a schematic perspective view of a composite of a metal member and a resin mold according to the present invention. FIG. 2 is a schematic view showing an II cross section (XY plane) of the composite shown in FIG. FIG. 3 is an example of a schematic diagram illustrating a II-II cross section (XZ plane) of the complex of FIG. 1. 4 (A) to 4 (C) are schematic views (XY plane) of the metal member as seen from the first main surface side of the metal member with only the metal member constituting the composite of FIG. 1 extracted. A preferred example of the penetrating part is shown. FIG. 5 is another example of a schematic diagram showing a II-II cross section (XZ plane) of the composite of FIG. 6 (A) to 6 (D) are schematic views (XY plane) of the metal member as seen from the first main surface side of the metal member with only the metal member constituting the composite of FIG. 1 extracted. The other example of the suitable formation pattern of a penetration part is shown.

  Embodiments of a composite of a metal member and a resin mold according to the present invention will be described in detail below.

<Composite of metal member and resin mold>
The composite according to the present invention comprises a plate-like metal member comprising a first main surface and a second main surface located on the opposite side of the first main surface, and at least a part of the metal member. An embedded resin mold, wherein the metal member has a penetrating portion penetrating in a plate thickness direction, and the penetrating portion is located on the first and second main surfaces inside the penetrating portion. It has the connection resin part which connects the resin parts of these.

  FIG. 1 shows an embodiment of a composite according to the present invention. In FIG. 1, reference numeral 1 is a composite, 20 is a metal member, and 201 and 202 are first main surfaces of metal member surfaces. The second main surface 30 is a resin mold. 2 is an II cross-sectional view (XY plane) including the surface (first main surface) of the metal member 20 of the composite body 1 shown in FIG. In FIG. 2, reference numeral 40 denotes a surface of the metal member 20, which is a joint portion with the resin mold 30, 21 is a through portion, and 31 is a connecting resin portion.

  As shown in FIGS. 1 and 2, in the composite 1 according to the present embodiment, a part of the metal member 20 is embedded in the resin mold 30 and the other part is exposed to the outside of the resin mold 30. It is a form. At this time, the metal member 20 has a joint 40 with the resin mold 30 on the surface thereof. The joint portion 40 is a part of the surface of the metal member 20 and exists between the portion 20a embedded in the resin mold 30 and the portion 20b exposed to the outside. That is, in FIG. 2, a portion separated by a broken line on the surface of the metal member 20 is the joint 40.

  Further, FIG. 3 is a II-II cross-sectional view (XZ plane) of the composite 1. As shown in FIG. 3, the metal member 20 has a through-hole 21 that penetrates in the plate thickness direction. The penetrating part 21 is formed in the joint part 40 with the resin mold 30 on the surfaces 201 and 202 of the metal member 20.

  Furthermore, the penetration part 21 has the connection resin part 31 which connects the resin parts of the resin mold 30 located on the 1st main surface 201 and the 2nd main surface 202 in the inside. Thereby, the composite_body | complex which concerns on this invention exhibits the outstanding airtightness between a resin mold and a metal member also in high temperature use environment, and can prevent degradation of the functional component which exists inside.

  Moreover, it is preferable that the composite_body | complex of this invention has the metal surface which has a sealed space in the resin mold and is not covered with the resin mold in the said sealed space. By having such a sealed space, functional components can be stored therein. Such a composite of the present invention preferably further includes a functional component in the resin mold.

  Such a functional component exists in a closed space made of a resin mold and a metal member. The functional part may be in close contact with the resin mold or the metal member, or may be partially in close contact with the resin mold or the metal member, or may be in close contact with either the resin mold or the metal member. It does not have to be.

  Examples of functional components include integrated circuits such as microprocessors, microcontrollers, memories, and semiconductor sensors.

Hereinafter, the constituent members of the composite will be described in detail.
(Metal member)
As shown in FIG. 1, the metal member 20 is plate-shaped and includes a first main surface 201 and a second main surface 202 located on the opposite side of the first main surface. Moreover, the thickness of the metal member 20 is preferably 1 μm to 10 mm, and more preferably 30 μm to 2 mm.

  There is no restriction | limiting in particular as a raw material of the metal member 20, According to a use, it can select from a well-known metal suitably. For example, the metal which consists of 1 type selected from copper, aluminum, iron, titanium, zinc, magnesium, lead, and tin, or the alloy containing 2 or more types can be mentioned. As an iron alloy, for example, an iron nickel alloy (42 Alloy) and various stainless steels. In addition, the metal member 20 may be partially plated (for example, surface) plated or roughened.

  In particular, the metal member 20 is preferably copper or aluminum. In general, in processing using a laser, a laser having a wavelength from visible light to near infrared light is widely used because it is relatively easy to obtain. For this reason, copper or aluminum having a high absorptance from visible light to near-infrared wavelength is particularly preferable in terms of good workability with respect to laser processing in the above-mentioned wavelength region.

  As shown in FIG. 2, the metal member 20 according to the present embodiment has a joining portion 40 in a joined state with the resin mold 30 on at least a part of the surface embedded in the resin mold 30. Further, the metal member 20 has a through portion 21 that penetrates in the plate thickness direction. Furthermore, such penetration part 21 has the connection resin part 31 which connects the resin parts of the resin mold 30 located on the 1st and 2nd main surface in the inside. With such a configuration, the resin mold 30 bonded to each of the first main surface 201 and the second main surface 202 is connected through the through portion 21, and the metal member 20 and the resin mold 30 are bonded to each other. It becomes good and high airtightness is realized when the composite 1 is formed.

  Here, the penetration part 21 should just be formed so that the metal member 20 may be penetrated in the thick plate direction, and a shape, a magnitude | size, a number, arrangement | positioning, a processing method, etc. are not specifically limited, For example, the following conditions are sufficient. preferable.

  The through portion 21 is preferably at least one of a through hole and a cutout portion. 4A to 4C are schematic views of the metal member 20 as seen from the first main surface 201 side of the metal member extracted from only the metal member 20 constituting the composite 1 in FIG. 1 (XY). Surface). In particular, in FIG. 4A, the metal member 20 in which the through hole 211 is formed, in FIG. 4B, the metal member 20 in which the notch portion 212 is formed, and in FIG. The metal members 20 in which both the notch portions 212 are formed are illustrated.

  4A to 4C, the shapes of the through hole 211 and the notch 212 are represented by shapes that are close to a circle, but are not limited thereto, and may be appropriately selected as necessary. it can. For example, examples of the shapes of the through hole 211 and the notch 212 include holes or notches such as a substantially circular shape, a polygonal shape, and a long and thin shape.

  Moreover, it is more preferable that the through portion 21 is at least the through hole 211. When the through-hole 21 is the through-hole 211, when the resin mold is joined to the metal material, the resin is shrunk in the process of solidifying from the molten state, so that the residual stress in the bonding direction is strong at the interface between the metal and the resin. Can be expressed.

  The diameter w1 of the through hole 211 is appropriately adjusted according to the thickness of the metal member 21, the area of the joint portion 40, the formation pattern and shape of the through hole 211, the fluidity of the resin used in the resin mold 30, and the like. However, it is preferably 100 μm or more. By setting it as the said range, the resin mold 30 joined to the 1st main surface 201 and the 2nd main surface 202 becomes easy to form a connection state through the through-hole 211. FIG. Further, from the viewpoint of more reliably forming the connected state and preventing the resin mold 30 from warping, the diameter w1 of the through hole 211 is more preferably 500 μm or more, and further preferably 1 mm or more. Further, from the viewpoint of maintaining an appropriate strength of the metal member 20, the diameter w1 of the through hole 211 is preferably 10 mm or less.

  In addition, the diameter w1 of the through hole 211 is preferably different between the first main surface 201 and the second main surface 202. In particular, it is more preferable that the cross section of the through hole 211 includes a substantially trapezoidal shape in a cross section (II-II cross section of the composite 1) obtained by cutting the metal member 20 in the thickness direction. When the cross section includes a substantially trapezoidal mold, the taper angle of the substantially trapezoidal mold is preferably 15 ° or more. By adopting such a shape, it becomes difficult for the composite 1 to peel off the resin due to stress in the peeling direction of the interface, such as expansion and contraction due to impact or heat. The through-hole 211 only needs to include a substantially trapezoidal shape in its cross section, and the entire cross section may be a substantially trapezoidal shape, or a part of the cross section may be a substantially trapezoidal shape. FIG. 5 is a cross-sectional view of the composite 1 taken along the line II-II (XZ plane). In FIG. 5, the cross section of the through hole 211 has a substantially trapezoidal shape with a taper angle θ.

  When the composite 1 further includes a functional component on the first main surface 201 (20a) of the metal member inside the resin mold 30, the diameter w1 of the through hole 211 is set to the first main surface 201. It is more preferable that the second main surface 202 is larger than the surface 201 (see FIG. 5). Furthermore, the ratio of the area of the through hole 211 of the second main surface 202 to the area of the through hole 211 of the first main surface 201 is preferably 1.5 to 100. By setting it as such a structure, the airtightness of the space in the resin mold 30 in which the functional component is arrange | positioned can further be improved.

  Further, the through portion 21 may be a notch portion 212. When a resin mold is joined to a metal material, the resin warps in the process of solidifying the resin from a molten state, and the metal and the resin tend to be peeled off at the peripheral edge of the metal material. However, by providing the notch, the warping of the resin can be suppressed and the airtightness can be improved. In particular, when the resin molding 30 is molded by injection molding, by forming the notch portion 212 on the side surface of the metal member 20 corresponding to the gate side (resin material injection side) of the mold for injection molding, Higher airtightness can be realized in the composite 1 after molding. Moreover, the diameter w2 of the notch part 212 becomes like this. Preferably it is 500 micrometers or more, More preferably, it is 1-10 mm. By setting it as the above range, a column structure in which the resin is filled in the notch can be formed, and a sufficient stress in the bonding direction can be generated at the interface between the metal and the resin, and high airtightness can be expressed. Moreover, although a notch part may be formed independently, it is more preferable to form in combination with the through-hole 211 like FIG.4 (C).

  The number of the through portions 21 in the joint portion 40 may be appropriately adjusted depending on the size, shape, arrangement pattern, etc. of the diameter of the through portion 21 (the diameter w1 of the through hole and the diameter w2 of the notch), but preferably 2 Or more, more preferably 4 or more, still more preferably 6 or more.

  In addition, the arrangement pattern of the through portions 21 in the joint portion 40 may be appropriately adjusted depending on the number, size, shape, and the like of the through portions 21, but the portion 20a that is embedded in the resin mold 30 and stores the functional components. It is preferable to have at least one symmetric pattern of 1 axis (X axis) symmetry and 2 axis (Y axis) symmetry, and more preferably at least 2 axis symmetry (Y axis). Thereby, the distribution of the residual stress at the interface between the metal and the resin becomes uniform, and the peeled portion is hardly generated. As a result, the airtightness at the interface between the metal and the resin is improved.

  As a specific example of the arrangement pattern of the penetrating portion 21, there are the ones as shown in FIGS. 6A to 6D in addition to FIGS. 4A and 4C. Among these, FIGS. 6C and 6D are preferable. In these cases, since the adhesiveness is ensured by making the volume of the penetrating portion relatively small, it is easy to achieve both current carrying capacity and strength.

  When the metal member 21 has two or more penetrating portions 21 in the joint portion 40, the distance between the penetrating portions 21 (distance from one penetrating portion to another penetrating portion) is the type of the resin mold 30 (particularly, It is preferable to adjust appropriately according to the linear expansion coefficient of the resin material, the size of the diameter of the through portion 21, the arrangement pattern, the shape of the portion 20 a for storing the functional component, and the like. Here, the “distance between the penetrating parts” is the closest distance between the edges of the penetrating parts, and the length of the shortest part from the edge of one penetrating part to the edge of the other penetrating part. It is.

  For example, the maximum value of the distances from one through portion 21 to the nearest other through portion 21 in each of the through portions 21 is preferably 20 mm or less, and more preferably 10 mm or less. In addition, when there are a plurality of other penetrating parts located closest to each other when viewed from one penetrating part and the distances to all the penetrating parts are the same length, all of those distances are “one penetrating part”. "Distance from another part to another nearest penetrating part". Further, the distance between adjacent penetrating parts may correspond to the “distance from one penetrating part to another penetrating part closest to each other”, or only for one side “distance closest to one penetrating part. “Distance to another penetrating part” corresponds to “a distance from another penetrating part to another penetrating part closest to one penetrating part”. By setting the maximum value to 20 mm or less, it is possible to suppress warping of the resin mold 40 and to generate a residual stress in a direction in which the metal and the resin are in contact with each other, thereby realizing excellent airtightness. Moreover, it is also preferable that the minimum value among the distances from the one penetrating part 21 to the closest penetrating part 21 is 1 mm or more. In this case, the metal member 20 can maintain an appropriate strength, and in the case of an electronic component, it is possible to ensure a necessary energization capacity.

  More specifically, when the resin constituting the resin mold 30 is polybutylene terephthalate (PBT), the maximum value among the distances from the one through portion to the nearest other through portion. Is preferably 15 mm or less. Moreover, when the magnitude | size of the diameter of the penetration part 21 is 0.5-2 mm, it is preferable that the said maximum value is 10 mm or less.

  The method for forming the penetrating part 21 as described above is not particularly limited, and a known method that can form the penetrating part 21 in a part of the surface of the metal member 20 may be used. Examples of a known method for forming the penetrating portion 21 include a drill, press processing, wire cut processing, and laser processing.

  In addition, when a part of the metal member is roughened or plated, the penetrating part may be present in the portion subjected to the roughening treatment or plating, or may be present in the base exposed portion. Alternatively, it may exist over the roughened or plated portion and the base exposed portion.

(Resin mold)
The resin mold according to the present embodiment is a member made of a resin material formed so as to embed at least a part of the metal member. The resin mold bonded to each of the first main surface and the second main surface of the metal member is in a connected state through the penetrating portion of the metal member. Therefore, in the composite according to the present invention, it is possible to effectively prevent the resin mold from warping due to a change in environmental temperature, and it is possible to realize excellent adhesion with the metal member.

  Such a resin material is not particularly limited as long as it is a material that can be bonded at a temperature lower than the melting point of the metal material, and examples thereof include a thermoplastic resin, a thermosetting resin, an elastomer, and a plastic alloy. Furthermore, it may be a material that cures by energy other than heat, such as a photo-curing resin, or a material that cures by other than heat, such as chemically solidifying by mixing a plurality of components.

Moreover, as a resin material which comprises a resin mold, it is preferable that a linear expansion coefficient is higher than the metal material which comprises a metal member, More specifically, what is 5-150 * 10 < ^-5 > / K is used suitably. be able to.

  More specifically, as the thermoplastic resin (general purpose resin), for example, polyethylene (PE), polypropylene (PP), polystyrene (PS), acrylonitrile / styrene resin (AS), acrylonitrile / butadiene / styrene resin (ABS), Examples thereof include methacrylic resin (PMMA) and vinyl chloride (PVC). Of these, ABS and PVC are preferable.

  Examples of the thermoplastic resin (general-purpose engineering resin) include polyamide (PA), polyacetal (POM), ultrahigh molecular weight polyethylene (UHPE), polybutylene terephthalate (PBT), GF reinforced polyethylene terephthalate (GF-PET), Examples include polymethylpentene (TPX), polycarbonate (PC), and modified polyphenylene ether (PPE). Of these, PBT and PC are preferable.

  Examples of the thermoplastic resin (super engineering resin) include polyphenylene sulfide (PPS), polyether ether ketone (PEEK), liquid crystal polymer (LCP), polytetrafluoroethylene (PTFE), polyether imide (PEI), Examples include polyarylate (PAR), polysulfone (PSF), polyethersulfone (PES), and polyamideimide (PAI). Of these, PEEK, PEI, and PAI are preferable.

  Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, unsaturated polyester, alkyd resin, epoxy resin, and diallyl phthalate. Of these, phenol resins and epoxy resins are preferable.

  Examples of the elastomer include thermoplastic elastomers and rubbers such as styrene / butadiene, polyolefin, urethane, polyester, polyamide, 1,2-polybutadiene, polyvinyl chloride, and ionomer. Of these, styrene / butadiene and urethane are preferred.

  Furthermore, what added the glass fiber to the thermoplastic resin, a polymer alloy, etc. can be mentioned. Addition of various conventionally known inorganic and organic fillers, flame retardants, ultraviolet absorbers, heat stabilizers, light stabilizers, colorants, carbon black, mold release agents, plasticizers, etc. within the range that does not deteriorate the airtightness It may be one containing an agent.

  These thermoplastic resins, thermosetting resins, and thermoplastic elastomers can be blended with known fibrous fillers. Examples of known fibrous fillers include carbon fibers, inorganic fibers, metal fibers, and organic fibers.

  More specifically, carbon fibers are well known, and PAN, pitch, rayon, lignin, and the like can be used.

  Examples of inorganic fibers include glass fibers, basalt fibers, silica fibers, silica / alumina fibers, zirconia fibers, boron nitride fibers, and silicon nitride fibers.

  Examples of the metal fiber include fibers made of stainless steel, aluminum, copper and the like.

  Organic fibers include polyamide fibers (fully aromatic polyamide fibers or semi-aromatic polyamide fibers and aliphatic polyamide fibers in which diamine and dicarboxylic acid are aromatic compounds), polyvinyl alcohol fibers, acrylic fibers, polyolefin fibers, polyoxymethylene fibers. Synthetic fibers such as polytetrafluoroethylene fibers, polyester fibers (including wholly aromatic polyester fibers), polyphenylene sulfide fibers, polyimide fibers, liquid crystal polyester fibers, natural fibers (cellulosic fibers, etc.) and regenerated cellulose (rayon) fibers, etc. Can be used.

  Moreover, when joining a resin mold to this metal material, it is suitable to join by well-known injection molding. The injection molding may be either outsert molding or insert molding. Also included are methods such as heat fusion, varnish application, and potting.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, All the aspects included in the concept of this invention and a claim are included, and various within the scope of this invention. Can be modified.

  Moreover, since the composite of the present invention has excellent adhesion between the resin mold and the metal member, it is suitably used for applications that require the inside to be kept airtight and applications that require adhesion between the metal member and the resin mold. can do. For example, the composite of the present invention is suitable as a composite molded body having therein an electrical / electronic component or the like that is easily affected by humidity and moisture. In particular, it should be used as a part for electrical or electronic equipment that is expected to be used in fields requiring high level waterproofing, for example, rivers, pools, ski resorts, baths, etc., and intrusion of moisture and moisture leads to failure. Is preferred. For example, it is useful as a housing for electric / electronic devices having a resin boss, a holding member and the like inside. Here, as a case for electric / electronic devices, in addition to mobile phones, cases for portable video electronic devices such as cameras, video integrated cameras, digital cameras, notebook computers, pocket computers, calculators, electronic notebooks , PDC, PHS and other portable information or communication terminal housings, MD, cassette headphone stereos, radio and other portable acoustic electronic device housings, LCD TVs / monitors, telephones, facsimiles, hand scanners, etc. Examples of the housing of the device. Moreover, since it is excellent in the adhesiveness in a high temperature use environment, it can be suitably applied to components used in a high temperature environment. For example, automobile parts can be mentioned.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, All the aspects included in the concept of this invention and a claim are included, and various within the scope of this invention. Can be modified.

  Next, in order to further clarify the effects of the present invention, examples and comparative examples will be described, but the present invention is not limited to these examples.

(Examples 1-6)
In Examples 1 to 6, a 20 mm × 70 mm × 2 mm copper plate was prepared, and a predetermined through portion was formed on the surface of the copper plate by drilling. In addition, the formation conditions of the penetration part were the conditions shown in Table 1, respectively.

  Using the polybutylene terephthalate resin (manufactured by Toray Industries, Inc., 1101G-X54), the copper plate in which the penetrating part is formed is insert-molded so that the resin wall thickness is 1.5 mm, 30 mm × 50 mm × 20 mm, A composite as shown in FIG. 1 was obtained. In addition, the said copper plate and resin were joined by the penetration part formed in the surface of a copper plate. Moreover, it has been confirmed in advance that the linear expansion coefficient of the polybutylene terephthalate resin with respect to the used copper plate is twice or more.

(Comparative Example 1)
In Comparative Example 1, a composite was obtained in the same manner as in Example 1 except that the penetrating part was not formed.

(Comparative Example 2)
In Comparative Example 2, the composite body was formed in the same manner as in Example 1 except that a roughened portion was formed on the surface of the copper plate using a laser (MD-V9600A manufactured by Keyence Corporation) without forming a penetration portion. Got. Moreover, the said copper plate and resin were joined by the roughening part formed in the surface of a copper plate.
The laser irradiation conditions were a spot diameter of 60 μm, a spot interval of 200 μm, a number of spot rows of 3, and a roughened region width of 630 μm. The arithmetic average roughness (Ra) according to the ISO standard (ISO 25178) was measured for the roughened portion formed under such conditions, and it was 0.11 μm.

[Evaluation]
The composites according to the above Examples and Comparative Examples were measured and evaluated as follows. Each evaluation condition is as follows. The results are shown in Table 1.

[Presence of connecting resin part]
About the composite_body | complex which concerns on the said Example, this composite_body | complex was cut | disconnected in the position which crosses a penetration part, and the cross section was observed with the scanning electron microscope (SEM). As a result, it was confirmed that the penetrating portion had a connecting resin portion for any composite.

[Airtight test (pressure loss value)]
First, holes were made in the composites according to the above examples and comparative examples, a tube was passed through, and the inside of the composite was pressurized with compressed air at 70 kPa, and the pressure loss after 1 minute was measured. In addition, the measurement was performed in a 60 degreeC environment.
For the measurement of pressure, a differential pressure gauge (manufactured by Cosmo Keiki Co., Ltd., DP gauge MODEL DP-330BA) was used. Moreover, it implemented by each sample N = 3, and measured value was averaged and it was set as each pressure loss value (Pa). In this example, 100 Pa or less was regarded as an acceptable level, and 50 Pa or less was evaluated as being even better.

  As shown in Table 1, in particular, it was confirmed that the composites of Examples 1 to 6 having a predetermined through portion had a small pressure loss value and excellent airtightness.

  On the other hand, it was confirmed that the composites of Comparative Examples 1 and 2 in which no penetrating part was formed had a large pressure loss value and were inferior in airtightness compared to the composite of the present invention.

DESCRIPTION OF SYMBOLS 1 Composite 20 Metal member 201 1st main surface 202 2nd main surface 21 Through part 211 Through hole 212 Notch part 30 Resin mold 31 Connection resin part 40 Joining part

Claims (10)

A plate-like metal member comprising a first main surface and a second main surface located on the opposite side of the first main surface;
A resin mold that embeds at least a part of the metal member,
The metal member has a penetrating portion that penetrates in the plate thickness direction,
The penetration part has a connecting resin part for connecting the resin parts of the resin mold located on the first and second main surfaces in the inside thereof, and is a composite of a metal member and a resin mold body.   The composite body of the metal member and resin mold of Claim 1 whose said penetration part is at least one of a through-hole and a notch part.   The composite body of the metal member and resin mold of Claim 2 whose said penetration part is a through-hole at least.   The composite of a metal member and a resin mold according to claim 2 or 3, wherein the diameter of the through hole is 100 µm or more.   The composite of the metal member and the resin mold according to any one of claims 2 to 4, wherein a diameter of the through hole is different between the first main surface and the second main surface.   The said through-hole is a composite body of the metal member and resin mold of any one of Claims 2-5 including a substantially trapezoid type | mold in the cross section seeing in the plate | board thickness direction cross section of the said metal member.   The composite body of the metal member and resin mold of Claim 6 whose taper angle of the said substantially trapezoid type | mold is 15 degrees or more. The composite further includes a functional component on the first main surface of the metal member inside the resin mold,
The composite of the metal member and the resin mold according to any one of claims 5 to 7, wherein the diameter of the through hole is larger on the second main surface than on the first main surface.   The ratio of the area of the said through-hole of the said 2nd main surface with respect to the area of the said through-hole of the said 1st main surface is 1.5-100, The metal member and resin mold of Claim 8 Complex. The metal member has two or more penetrating portions at a joint portion with the resin mold,
The metal according to any one of claims 1 to 9, wherein a maximum value is 20 mm or less in a distance from one through portion to the nearest through portion in each of the through portions. Composite of member and resin mold.

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