WO1997008927A2 - Procede de fabrication d'une piece de boitier servant de blindage pour appareils de radiocommunication - Google Patents

Procede de fabrication d'une piece de boitier servant de blindage pour appareils de radiocommunication Download PDF

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Publication number
WO1997008927A2
WO1997008927A2 PCT/DE1996/001608 DE9601608W WO9708927A2 WO 1997008927 A2 WO1997008927 A2 WO 1997008927A2 DE 9601608 W DE9601608 W DE 9601608W WO 9708927 A2 WO9708927 A2 WO 9708927A2
Authority
WO
WIPO (PCT)
Prior art keywords
radio
housing part
electrically conductive
shielding effect
housing
Prior art date
Application number
PCT/DE1996/001608
Other languages
German (de)
English (en)
Other versions
WO1997008927A3 (fr
Inventor
Edgar Jochheim
Original Assignee
Siemens Aktiengesellschaft
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
Priority claimed from DE19630967A external-priority patent/DE19630967A1/de
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1997008927A2 publication Critical patent/WO1997008927A2/fr
Publication of WO1997008927A3 publication Critical patent/WO1997008927A3/fr

Links

Classifications

    • 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
    • H05K9/002—Casings with localised screening
    • H05K9/0039—Galvanic coupling of ground layer on printed circuit board [PCB] to conductive casing
    • 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
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1417—Mounting supporting structure in casing or on frame or rack having securing means for mounting boards, plates or wiring boards

Definitions

  • the present invention relates to a method for producing a housing part with a shielding function and a housing part with a shielding function, which has been produced by this method, for a radio from shell-shaped housing parts with their open sides facing one another and arranged one on top of the other Recording the device of the radio.
  • shielding is required for mobile radio or cordless telephone devices.
  • shielding e.g. soldered shield frames, shield plates, metallized plastic housings, die-cast housings etc. are used. These components increase the weight of the device, increase the volume of the device, increase the price of the device, and are very production-intensive due to numerous difficult assembly processes.
  • the use of metalized or galvanized plastic parts as housing parts is either complicated in terms of production technology, since in each case two completely separate work steps with different machine tools are necessary.
  • the invention is based on the object of producing in a simple manner housing parts for a housing of the type mentioned at the outset which have a good shielding effect.
  • This object is achieved for a method of the type described in the introduction in that, in order to produce the shielding function, an inner layer made of electrically conductive elastic plastic is applied to the housing part, which is applied as a second component during a two-component injection molding process .
  • the method according to the invention solves the technical manufacturing problem of an additional aftertreatment, or the installation of additional screen parts in a second working step is replaced with a second tool by a single production step.
  • FIG. 1 shows a longitudinal section through a radio in which a housing part produced by means of the method according to the invention is used
  • FIG. 2 shows a cross section through the radio of FIG. 1 between the buttons of the radio
  • the radio 1 has a display 2 and a keypad 3 on its upper side.
  • An antenna 4 is attached to the side of the upper end face.
  • the housing of the radio which is produced by injection molding, consists of an upper shell 5 and a lower shell 6, which face one another open sides are arranged one on top of the other.
  • the upper shell 5 has openings for the display 2 and the keypad 3, among other things.
  • a circuit board 7 for receiving components of the high-frequency and logic modules of the radio is arranged between the half-shells 5 and 6 lying one on top of the other. In order to achieve EMC shielding, the lower shell 6 must therefore be used as a shield.
  • the lower shell 6 is produced in a two-component injection molding process.
  • the outer layer is produced from the first component, consisting of a thermoplastic, whereupon in a second step the second component, consisting of an electrically conductive silicone plastic, is applied as the conductive inner layer.
  • 3 and 4 show a detail of details in the support area of the circuit board on the shell edge.
  • the electrically conductive silicone plastic 8 is led up to the upper side of the lower shell 6 in order to make contact with the mass surfaces of the printed circuit board 7 at this point.
  • the inside of the lower shell is stepped in the upper region, with the underside of the printed circuit board 7 resting on the surface of the step parallel to the printed circuit board 7 on the silicone plastic 8, which is connected to the printed circuit board 7 makes a low-profile contact with the ground surfaces of the printed circuit board 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une pièce de boîtier servant de blindage et une pièce de boîtier servant de blindage destinée à un appareil de radiocommunication, lequel est constitué de parties de boîtier en forme de coques assemblées avec les côtés ouverts orientés l'un vers l'autre, ces parties renfermant le dispositif de l'appareil de radiocommunication. Afin d'éviter une seconde étape de fabrication, on réalise la fonction de blindage en appliquant, sur la partie de boîtier (6) constituée d'une matière thermoplastique, une couche intérieure de matière plastique de silicone (8) conductrice électriquement, cette couche étant appliquée sous forme de second composant dans un procédé de moulage par injection à deux composants.
PCT/DE1996/001608 1995-08-31 1996-08-29 Procede de fabrication d'une piece de boitier servant de blindage pour appareils de radiocommunication WO1997008927A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19532190.1 1995-08-31
DE19532190 1995-08-31
DE19630967A DE19630967A1 (de) 1995-08-31 1996-07-31 Verfahren zur Herstellung eines Gehäuseteils mit Schirmfunktion für Funkgeräte
DE19630967.0 1996-07-31

Publications (2)

Publication Number Publication Date
WO1997008927A2 true WO1997008927A2 (fr) 1997-03-06
WO1997008927A3 WO1997008927A3 (fr) 1997-03-27

Family

ID=26018180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001608 WO1997008927A2 (fr) 1995-08-31 1996-08-29 Procede de fabrication d'une piece de boitier servant de blindage pour appareils de radiocommunication

Country Status (1)

Country Link
WO (1) WO1997008927A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432656A (en) * 2005-11-25 2007-05-30 Titon Hardware Slot ventilator mounted on a window or door to be ventilated
KR101011578B1 (ko) * 2009-07-02 2011-01-27 송재빈 셀터박스

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508794A1 (de) * 1984-03-12 1985-09-19 Tokai Kogyo K.K., Obu, Aichi Kunststoffgehaeuse mit einem leitenden film
EP0180383A2 (fr) * 1984-10-26 1986-05-07 Aronkasei Co., Limited Méthode de fabrication pour boîtiers ayant une structure à deux couches
DE9101511U1 (de) * 1990-02-13 1991-06-06 Kitagawa Industries Co., Ltd., Nagoya, Aichi Gehäuse für ein tragbares Kommunikationsgerät
US5150282A (en) * 1990-12-14 1992-09-22 Fujitsu Limited Electromagnetic shielding structure of high-frequency circuit arrangements
EP0633718A1 (fr) * 1993-07-07 1995-01-11 Durmont Teppichbodenfabrik Ag Méthode de la fabrication de blindage pour éléments appareils ou équipement électriques ou électroniques, et dispositif de blindage fabriqué de ladite méthode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62275724A (ja) * 1986-05-23 1987-11-30 Hitachi Chem Co Ltd 電磁波シ−ルド成形品の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508794A1 (de) * 1984-03-12 1985-09-19 Tokai Kogyo K.K., Obu, Aichi Kunststoffgehaeuse mit einem leitenden film
EP0180383A2 (fr) * 1984-10-26 1986-05-07 Aronkasei Co., Limited Méthode de fabrication pour boîtiers ayant une structure à deux couches
DE9101511U1 (de) * 1990-02-13 1991-06-06 Kitagawa Industries Co., Ltd., Nagoya, Aichi Gehäuse für ein tragbares Kommunikationsgerät
US5150282A (en) * 1990-12-14 1992-09-22 Fujitsu Limited Electromagnetic shielding structure of high-frequency circuit arrangements
EP0633718A1 (fr) * 1993-07-07 1995-01-11 Durmont Teppichbodenfabrik Ag Méthode de la fabrication de blindage pour éléments appareils ou équipement électriques ou électroniques, et dispositif de blindage fabriqué de ladite méthode

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 157 (M-696), 13.Mai 1988 & JP 62 275724 A (HITACHI CHEM CO LTD) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432656A (en) * 2005-11-25 2007-05-30 Titon Hardware Slot ventilator mounted on a window or door to be ventilated
KR101011578B1 (ko) * 2009-07-02 2011-01-27 송재빈 셀터박스

Also Published As

Publication number Publication date
WO1997008927A3 (fr) 1997-03-27

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