KR20090083095A - Conductive gasket for surface mount device - Google Patents

Conductive gasket for surface mount device Download PDF

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Publication number
KR20090083095A
KR20090083095A KR1020080009065A KR20080009065A KR20090083095A KR 20090083095 A KR20090083095 A KR 20090083095A KR 1020080009065 A KR1020080009065 A KR 1020080009065A KR 20080009065 A KR20080009065 A KR 20080009065A KR 20090083095 A KR20090083095 A KR 20090083095A
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KR
South Korea
Prior art keywords
conductive
elastic body
present
gasket
conductive gasket
Prior art date
Application number
KR1020080009065A
Other languages
Korean (ko)
Inventor
이재형
이찬우
Original Assignee
이재형
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이재형 filed Critical 이재형
Priority to KR1020080009065A priority Critical patent/KR20090083095A/en
Publication of KR20090083095A publication Critical patent/KR20090083095A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/0015—Gaskets or seals
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure

Abstract

According to the present invention, two circuits are electrically connected to each other, and the electrode unit is fixed by reflow soldering to a printed circuit board to perform functions such as signal processing and grounding, and the other circuit contacts the opposite side to transfer electrical signals between the two circuits. In addition, the present invention relates to a surface mount conductive gasket capable of effectively blocking electromagnetic waves, wherein the surface mount conductive gasket of the present invention comprises a non-conductive inner elastomer in the form of a polygonal tube of silicon material; A conductive sheet surrounding the inner elastic body; And a metal electrode attached to one surface of the conductive sheet.

The surface-mount conductive gasket of the present invention configured as described above has an excellent elastic restoring force and electrical resistance without thermal deformation even at high temperature by using an internal elastic body made of silicon, and enables reflow soldering. Since it is used as the inner hollow body of the shape not only has the effect of further improving the modulus of elasticity, especially when the inner hollow portion is a hexagon has a characteristic that the central portion of the left and right sides easily folded.

Description

Conductive gasket for surface mount device

The present invention relates to a surface-mount conductive gasket, and more particularly, to electrically connect two circuits so as to perform signal processing and grounding, and to fix the electrode part by reflow soldering to a printed circuit board, and the other circuit. The present invention relates to a surface mount conductive gasket capable of contacting the opposite side to transfer electrical signals between two circuits and effectively blocking electromagnetic waves.

In general, electromagnetic waves generated in the internal circuits of various electronic devices are discharged to the outside through the air or conducted through power lines. Such electromagnetic waves may cause noise and malfunction to neighboring components or devices, Even known to have a harmful effect. In addition, as the circuit becomes complicated due to the recent shortening and digitization of electronic devices, the possibility of electromagnetic wave is rapidly increasing, and the regulation of electromagnetic waves is strengthened not only in advanced countries but also in Korea.

Typically, the electronic device is composed of a front panel portion, a rear terminal portion, and a metal case surrounding the rest of the electronic apparatus. Since the metal case shields electromagnetic waves, electromagnetic waves do not leak, but electromagnetic waves are significantly leaked into the gap between the panel portion, the terminal portion, and the contact portion of the metal case. Conventionally, in order to prevent the leakage of electromagnetic waves, ring-wires are installed in the gaps and the ring-wires are grounded in various places inside the electronic devices. Therefore, the above-mentioned problem is easy to install, and a conductive gasket capable of effectively blocking electromagnetic waves while simplifying the internal structure, an elastically deformable elastic body; A flexible conductor surrounding the elastic body and conducting between the exterior parts of the electronic device; And a constitution of a conductive gasket having means for fixing an elastic body and a conductor, and arranged between the electronic device exterior parts.

However, such a conventional conductive gasket has a disadvantage that the blocking rate of electromagnetic waves is not high. Therefore, it solves this problem and provides a gasket that can increase the blocking rate of electromagnetic waves, thereby minimizing harm to the human body from electromagnetic waves. For the purpose of minimizing the prevention of malfunctions, Korean Utility Model Application No. 2000-0015240 states that "Slopes of rectangular polyurethane-based elastic bodies (1) have a conductor (2) plated with copper and nickel on P and E fibers. In a typical gasket formed by being wrapped and having an adhesive tape 3 attached to the bottom thereof, a conductive copper plate 4 is formed on the upper surface of the conductor 2 on three sides of the upper, left, and right sides with an adhesive 5. EMI shielding electromagnetic shielding gasket characterized in that it discloses. However, the above-described design and construction of a generalized gasket is generally an electrically conductive gasket wrapped with a non-conductive urethane sponge with an electrically conductive fiber, or the manufacturing method of such an electrically conductive fiber gasket, nickel, copper in nylon or polyester fiber , Electroless plating with silver or gold to prepare the electrically conductive fiber, coating the non-conductive polymer hot melt on one side of the electrically conductive fiber, and then applying heat while enveloping the urethane sponge, the hot melt melts and is in contact with the urethane sponge. According to the gasket, nickel, copper, silver or gold is used as the metal material, which is expensive and consequently increases the manufacturing cost. To solve this problem, Korean Patent Application No. 2004-0060202 describes "natural pulp. The base and the surface of the natural pulp base An electrically conductive sheet consisting of a soft aluminum foil adhered via a complex and a hot melt layer formed on the back surface of the natural pulp base, and continuously and overlapped by the electrically conductive sheet to be bonded by the hot melt layer. And electrically conductive gaskets comprising a non-conductive elastic member.

However, according to the related art as well as the above-described invention, the conductive gasket is generally applied to the urethane sponge by wrapping the conductive fabric and attaching the conductive adhesive tape to the lower part to be fixed to the printed circuit board. It is difficult to maintain excellent conductivity due to time-dependent changes in conductive adhesion surface, and it is difficult to use for switching applications due to weak elastic resilience of non-conductive elastomers for long-term use.

Moreover, as a way to solve the above shortcomings, a method of enabling reflow soldering by bending a highly elastic metal plate into a press die has been proposed and used. However, this method requires various new molds according to shape and size. There is a disadvantage that a large manufacturing cost is required to satisfy the market demand for a product of size.

Accordingly, an object of the present invention is to provide a surface mount conductive gasket that solves the above problems, and in detail, the conductive and elasticity is continuously maintained due to excellent heat resistance, so that the two circuits are electrically connected to process and ground. It is to provide a surface mounting conductive gasket capable of reflow soldering and excellent electromagnetic shielding effect.

Another object of the present invention is to make it easy to adjust the length in the same shape, the surface mounting conductive gasket that can provide excellent conductivity by using a metal paste with excellent conductivity to minimize the potential difference between the conductive fabric and the electrode It is to provide.

Surface mounting conductive gasket of the present invention for achieving the above object;

A non-conductive inner elastomer in the form of a polygonal tube of silicon material;

A conductive sheet surrounding the inner elastic body; And

It is characterized by consisting of a metal electrode attached to one surface of the conductive sheet.

According to another configuration of the present invention, the elastic body is characterized in that the inside of the hollow rectangular tube shape.

According to another configuration of the present invention, the elastic body is characterized in that the thickness of the upper and lower surface is 1.5 to 3.0 times compared to the thickness of the left and right side.

According to another configuration of the present invention, the inner shape of the elastic body is characterized in that the hexagon.

According to another configuration of the present invention, the gasket is characterized in that the conductive sheet is coated with a surface of the liquid silicon using any one of metal plated fibers or metal foil, and then adhesively bonded to the elastic body.

According to another configuration of the present invention, the solder metal electrode is characterized in that it is attached to one side of the conductive sheet with a conductive paste.

The surface-mount conductive gasket of the present invention configured as described above can maintain stable conductivity by using uniformly plated fabric or metal foil, and excellent elastic restoring force without thermal deformation even at high temperature by using an internal elastic body made of silicon. And electrical resistance to enable reflow soldering. Also, since the inner elastic body is used as the inner hollow body having a certain shape, the elastic modulus can be further improved, and especially when the inner hollow part is hexagonal, the left and right sides The central part of has the property of being easily folded. Furthermore, the surface mount conductive gasket according to the present invention has a merit that it is possible to continuously produce in a series of processes, and that the production process is simple, thereby providing a cost-effective and safe quality product due to productivity improvement.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, these embodiments are provided for better understanding of the present invention and are not intended to limit the scope of the present invention.

1 is a perspective view showing a surface mount conductive gasket according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the shape and structure of a non-conductive silicon tube of the surface mount conductive gasket according to an embodiment of the present invention. .

As shown in FIG. 1, the non-conductive elastic body 1 forms a polygonal tubular shape, and the conductive sheet 2 is configured to surround the non-conductive elastic body 1. In addition, the metal electrode 3 is attached to one surface of the conductive sheet 2 so that the printed circuit board can be soldered.

The material of the non-conductive elastic body 1 is preferably a silicone rubber capable of withstanding high temperatures, the shape of which is hollow. The hollow tubular inner elastic body 1 may have the same or different shape of the outer side 101 and the inner side 102 thereof.

In addition, as shown in FIG. 2, the thickness b of the upper and lower surfaces 120 of the non-conductive elastic body 1 is preferably the thickness a of the left and right side surfaces 110 of the elastic body 1. 1.5 to 4.0 times. If the thickness (b) of the non-conductive elastic body (1) is less than 1.5 times the thickness (a) or vice versa if the thickness exceeds 4.0 times, there is a disadvantage in that the resilient elastic properties against vertical up and down vertical pressing of the product is poor Not desirable

Most preferably, the thickness ratio of the thickness a and the thickness b is 1.0: 1.5 to 3.0, and the hardness is preferably Shore A 60 or less.

The conductive sheet 2 may be a conductive fabric in which at least one selected from copper, nickel, silver, gold, and carbon is plated on a polyester synthetic resin fabric, and the conductive sheet 2 may be aluminum having excellent conductivity. Metal foils such as foils may also be used.

The electrical resistance of the conductive sheet 2 is preferably 0.1 kPa or less.

In the case of using a metal foil such as aluminum foil as the conductive sheet 2, the thickness of the foil is preferably 20 µm or less.

The metal electrode 3 may be used by plating nickel, tin, silver, and gold on copper or copper with a metal plate, and the thickness is preferably 10 to 100 μm.

3 is a development view schematically illustrating a manufacturing process of the surface mounting conductive gasket according to the present invention.

The surface mount conductive gasket of the present invention configured as described above is more specifically provided on one surface of the conductive sheet 2 in order to easily attach the conductive sheet 2 to the elastic body 1 as shown in FIG. 3. By coating a liquid silicone rubber (11) having good adhesion, and hardening the coated surface to the elastic body (1), and then hardening the conductive surface gasket 10 of the present invention having a very excellent conductivity and elasticity can be produced do.

A metal electrode 3 is attached to the conductive gasket 10 obtained as described above for surface-mounted reflow soldering, as shown in FIG. 3, on the metal electrode 3 to minimize the potential difference. The metal paste 12 may be coated to adhere the coated surface to the connection surface of the conductive sheet 2 attached on the elastic body 1.

4 is a cross-sectional state diagram showing a state in which the surface mounting conductive gasket according to the embodiment of the present invention is actually applied.

As shown in FIG. 4, the electrode portion 3 of the surface mounting conductive gasket 10 according to the present invention is soldered 21 to the printed circuit board 20 to be fixed and connected to another circuit on the opposite side thereof. It becomes the structure which 30 contacts.

Therefore, the electric flow path is made of another circuit connection part 30-conductive sheet 2-conductive paste 12-copper foil electrode 3-solder 21-printed circuit board 20.

1 is a perspective view showing a surface mounting conductive gasket according to an embodiment of the present invention,

2 is a cross-sectional view showing the shape and structure of a non-conductive silicon tube of a surface mounting conductive gasket according to an embodiment of the present invention;

3 is an exploded view schematically showing a manufacturing process of the surface mounting conductive gasket according to the present invention;

4 is a cross-sectional state diagram showing a state in which the surface mounting conductive gasket according to the embodiment of the present invention is actually applied.

* Explanation of symbols for main parts of the drawings

1 non-conductive elastomer 2 conductive sheet

3: metal electrode 10: conductive gasket

11: silicone rubber 12: metal paste

20: printed circuit board

Claims (6)

A non-conductive inner elastomer in the form of a polygonal tube of silicon material; A conductive sheet surrounding the inner elastic body; And Surface mounting conductive gasket, characterized in that consisting of a metal electrode attached to one surface of the conductive sheet. 2. The surface mounting conductive gasket according to claim 1, wherein the elastic body has a hollow rectangular tube shape. The conductive gasket for surface mounting according to claim 1, wherein the elastic body has a thickness of 1.5 to 3.0 times the thickness of the upper and lower surfaces thereof compared to the thickness of the left and right sides. 4. The surface mounting conductive gasket according to any one of claims 1 to 3, wherein the inner shape of the elastic body is hexagonal. 2. The surface mounting conductive gasket according to claim 1, wherein the gasket is coated with a surface of liquid silicon using any one of metal plated fiber or metal foil as a conductive sheet, and then hardly bonded to an elastic body. 2. The surface mounting conductive gasket of claim 1, wherein the solder metal electrode is attached to one surface of the conductive sheet using a conductive paste.
KR1020080009065A 2008-01-29 2008-01-29 Conductive gasket for surface mount device KR20090083095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080009065A KR20090083095A (en) 2008-01-29 2008-01-29 Conductive gasket for surface mount device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080009065A KR20090083095A (en) 2008-01-29 2008-01-29 Conductive gasket for surface mount device

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KR20090083095A true KR20090083095A (en) 2009-08-03

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KR1020080009065A KR20090083095A (en) 2008-01-29 2008-01-29 Conductive gasket for surface mount device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014022125A1 (en) * 2012-07-28 2014-02-06 Laird Technologies, Inc. Metallized film-over-foam contacts
KR102138782B1 (en) * 2019-05-30 2020-07-29 주식회사 아이씨에이치 Durable electromagnetic shielding conductive gasket
US11751319B2 (en) 2018-07-25 2023-09-05 Samsung Electronics Co., Ltd. Electronic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014022125A1 (en) * 2012-07-28 2014-02-06 Laird Technologies, Inc. Metallized film-over-foam contacts
US9131616B2 (en) 2012-07-28 2015-09-08 Laird Technologies, Inc. Metallized film-over-foam contacts
US11751319B2 (en) 2018-07-25 2023-09-05 Samsung Electronics Co., Ltd. Electronic device
KR102138782B1 (en) * 2019-05-30 2020-07-29 주식회사 아이씨에이치 Durable electromagnetic shielding conductive gasket

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