EP0119241B1 - A method of producing electronic components - Google Patents

A method of producing electronic components

Info

Publication number
EP0119241B1
EP0119241B1 EP83902966A EP83902966A EP0119241B1 EP 0119241 B1 EP0119241 B1 EP 0119241B1 EP 83902966 A EP83902966 A EP 83902966A EP 83902966 A EP83902966 A EP 83902966A EP 0119241 B1 EP0119241 B1 EP 0119241B1
Authority
EP
European Patent Office
Prior art keywords
components
substrate
impressions
holes
connections
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP83902966A
Other languages
French (fr)
Other versions
EP0119241A1 (en
Inventor
Lars Anders Olofsson
Fritz Lars Gunnar Bjorklund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP0119241A1 publication Critical patent/EP0119241A1/en
Application granted granted Critical
Publication of EP0119241B1 publication Critical patent/EP0119241B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/255—Means for correcting the capacitance value
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/006—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistor chips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/02—Manufacture of fuses
    • H01H69/022—Manufacture of fuses of printed circuit fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/02—Manufacture of fuses
    • H01H2069/025—Manufacture of fuses using lasers

Definitions

  • the invention relates to a method of producing electronic components (resistors, capac tances, fuses and the like ) which includes an insula ⁇ ting substrate provided with layers or wires and electrical connections for the components.
  • Microelectronic components have so small dimensions that difficulties occur in their manufacture. This applies to handling individual compo ⁇ nents in the manufacturing process itself, as well as tnei r after treatment
  • One example of the former is fuses,of which the dimensions up to now must exceed a given minimum, because a reduction thereof would result in complicated time-consuming handling.
  • An example of the latter is resistances which require adjustment after manufacture.
  • the basic concept of the invention is to manufacture electronic compo ⁇ nents of the type mentioned in the introduction on a common substrate and to perform all operations before the substrate is divided up to individual components.
  • Figure 1 is a portion of the substrate provided with resistors
  • Figure 2 is a portion of the substrate provided with wire fuses
  • Figure 3 is a cross-section to a larger scale of a resistor with connections.
  • a non-conductive substrate 1, according to figure ' is provided during the course of production with a first set of parallel fractural impres ⁇ sions 2, e.g. grooves, which define strips with the width of the ready
  • the substrate is then provided with uniformly spaced through holes 3 along the central lines of these strips, so that the holes form columns.
  • the substrate is provided with a second set of parallel frac ⁇ tural impressions 6 passing through the holes 3.
  • the impressions 6 are at right angles to the impressions 2 and define the length of the compo ⁇ nent.
  • the inside of each hole, together with a minor area round the hole on both sides of the substrate, is coated with a metal paste 4 to form electrical connections for the component.
  • a layer of electrically resistive material 5 is deposited in the form of squares in the areas defined by the fractural impressions, such that all squares will be separated from each other but each has contact with two electrical connections, the squares thus being connected in series in rows.
  • FIG. 1 illustrates a substrate 11, provided witn fractural impressions 12,16 and holes 13, in the same way as the embodiment of figure 1.
  • the holes are provided with a conductive coating 14, which is sintered to provide electrical connections.
  • a layer of electrically conductive material is applied, in the form of two mutually separated squares 17 and 18 within a field defined by the fractural impressions, such that these squares are each in electrical contact with a connection.
  • metal wires 15, constituting fuse elements are fastened between the squares 17 and 18, e.g. by thermo-compression or supersonic welding.
  • a Layer is applied between two connections in the manner apparent from the description applying to figure 1.
  • These Layers are electrically conductive in this application, and their thickness, width and Length adapted to a given current strength at which the layer fuses.
  • the layer may be heatinsulated from the sub ⁇ strate with the aid of a glass coating, whereby its ability to with ⁇ stand current is decreased.
  • the final step in the manufacture of fusable fuses is performed in the same way as with the method according to figure 1, namely in that the individual components are obtained by the common substrate being ruptured along the fractural impressions.
  • Figure 3 illustrates an electrical connection in cross-section.
  • the metal paste is applied by impressing from one or two sides, according to need, subsequent to which the viscous material forms a coating on the inner wall of the hole.
  • the conductive material constituting the coating of the hole is in electrical contact with the layer 5.
  • the method in accordance with the above signifies the advance in respect to the prior art residing in that the individual components can be processed in one operation during manufacture, while these are still in one continuous unit, where each unit embraces a number of components in the order of magnitude of 100, for example. Such operations are enabled since each component has a well-defined fixed location in the common substrate.
  • An advantage is obtained if, in accordance with the invention, the electrical connections are made available from both of the substrate. This makes the ready components easy to assemble on a printed board assembly with the aid of so-called surface soldering.

Abstract

Method of producing electronic components, e.g. resistors, capacitances, fuses and the like. The components consist of an insulating substrate with electrical connections, connected by layers or wires. In accordance with the invention, the components (5) and their connections are applied to a common substrate (1), which is provided with fractural impressions (6). The components lie in the areas between the impressions. The connections are produced by making holes in the substrate along certain of the fractural impressions (6), and the envelope surface of the holes being coated with conductive material (4), as well as an area about the holes on both sides of the substrate. The components (5) are connected to the connections, subsequent to which the substrate is divided into individual components along the fractural impressions. Certain components require adjustment in manufacture, e.g. by laser beam. This adjustment is carried out before the substrate is divided up.

Description

A METHOD OF PRODUCING ELECTRONIC COMPONENTS
TECHNICAL FIELD
The invention relates to a method of producing electronic components (resistors, capac tances, fuses and the like) which includes an insula¬ ting substrate provided with layers or wires and electrical connections for the components.
BACKGROUND ART
Microelectronic components have so small dimensions that difficulties occur in their manufacture. This applies to handling individual compo¬ nents in the manufacturing process itself, as well as tnei r after treatment One example of the former is fuses,of which the dimensions up to now must exceed a given minimum, because a reduction thereof would result in complicated time-consuming handling. An example of the latter is resistances which require adjustment after manufacture.
DISCLOSURE OF INVENTION
The basic concept of the invention is to manufacture electronic compo¬ nents of the type mentioned in the introduction on a common substrate and to perform all operations before the substrate is divided up to individual components.
PREFERRED EMBODIMENT
A preferred embodiment of the invention will now be described in con¬ junction with the figures where
Figure 1 is a portion of the substrate provided with resistors Figure 2 is a portion of the substrate provided with wire fuses Figure 3 is a cross-section to a larger scale of a resistor with connections.
A non-conductive substrate 1, according to figure ' . is provided during the course of production with a first set of parallel fractural impres¬ sions 2, e.g. grooves, which define strips with the width of the ready
OMPI WIPO component. The substrate is then provided with uniformly spaced through holes 3 along the central lines of these strips, so that the holes form columns. The substrate is provided with a second set of parallel frac¬ tural impressions 6 passing through the holes 3. The impressions 6 are at right angles to the impressions 2 and define the length of the compo¬ nent. The inside of each hole, together with a minor area round the hole on both sides of the substrate, is coated with a metal paste 4 to form electrical connections for the component. A layer of electrically resistive material 5 is deposited in the form of squares in the areas defined by the fractural impressions, such that all squares will be separated from each other but each has contact with two electrical connections, the squares thus being connected in series in rows. The substrate with its resistors is heated to sinter the metal paste 4. After sintering, the individual resistances of tne resistors are measured and the values adjusted e.g. by treatment with a laser beam, sandblasting or the like. The resistors are possibly coated with a protective layer, after which the substrate is broken into striσs along the impressions 2, and the strips thus obtained are broken into individual components along the impressions 6 at the holes. In the latter case, the rupture line passes through the centres of the holes. The conductive coating of the holes is thus parted into two halves which constitute electrical connections for the individual comDonents. Figure 2 illustrates a substrate 11, provided witn fractural impressions 12,16 and holes 13, in the same way as the embodiment of figure 1. The holes are provided with a conductive coating 14, which is sintered to provide electrical connections. A layer of electrically conductive material is applied, in the form of two mutually separated squares 17 and 18 within a field defined by the fractural impressions, such that these squares are each in electrical contact with a connection. In contradistinction to the method according to figure 1, metal wires 15, constituting fuse elements, are fastened between the squares 17 and 18, e.g. by thermo-compression or supersonic welding. A protective coating, e.g. of plastics, -can be applied over the metal wires. In an alternative method of producing fusabLe fuses, a Layer is applied between two connections in the manner apparent from the description applying to figure 1. These Layers are electrically conductive in this application, and their thickness, width and Length adapted to a given current strength at which the layer fuses. The layer may be heatinsulated from the sub¬ strate with the aid of a glass coating, whereby its ability to with¬ stand current is decreased. The final step in the manufacture of fusable fuses is performed in the same way as with the method according to figure 1, namely in that the individual components are obtained by the common substrate being ruptured along the fractural impressions. Figure 3 illustrates an electrical connection in cross-section. The metal paste is applied by impressing from one or two sides, according to need, subsequent to which the viscous material forms a coating on the inner wall of the hole. As will be seen, the conductive material constituting the coating of the hole, is in electrical contact with the layer 5. The method in accordance with the above signifies the advance in respect to the prior art residing in that the individual components can be processed in one operation during manufacture, while these are still in one continuous unit, where each unit embraces a number of components in the order of magnitude of 100, for example. Such operations are enabled since each component has a well-defined fixed location in the common substrate. An advantage is obtained if, in accordance with the invention, the electrical connections are made available from both of the substrate. This makes the ready components easy to assemble on a printed board assembly with the aid of so-called surface soldering.

Claims

1259
1. A method of producing electronic components (resistors, capacitances, fuses and the like) which includes an insulating substrate provided with layers or wires and electrical connections for the components, the components and their connections being applied to a common substrate within individual areas which are defined by fractural impressions, characterized in that the electrical connections are produced by holes being made in the insulating substrate along said fractural impressions, the envelope surface of the holes together with an area round the holes on both sides of the substrate being provided with a conductive coating, such that the components come into electrical contact with the coating in the hole, subsequent to which the substrate is divided up along the fractural impressions such that the respective halves of the enve¬ lope surface constitute connection surface for the contiguous comDoπent.
2. Method as claimed in claim 1, characterized in that in manufacture of components, having an electrical value that must be adjusted during manufacture, e.g. by treatment with a laser beam, sandolasting or the like, a measuring device is connected to the components defined by the fractural impressions for measuring their electrical value, and in that th adjustment is carried out before dividing up components along the frac¬ tural impressions.
i E OMPI
YA, WIP £ .NAT
EP83902966A 1982-09-17 1983-09-14 A method of producing electronic components Expired EP0119241B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8205343A SE443485B (en) 1982-09-17 1982-09-17 WANT TO MAKE ELECTRONIC COMPONENTS
SE8205343 1982-09-17

Publications (2)

Publication Number Publication Date
EP0119241A1 EP0119241A1 (en) 1984-09-26
EP0119241B1 true EP0119241B1 (en) 1986-12-30

Family

ID=20347902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83902966A Expired EP0119241B1 (en) 1982-09-17 1983-09-14 A method of producing electronic components

Country Status (5)

Country Link
EP (1) EP0119241B1 (en)
JP (1) JPS59501566A (en)
DE (1) DE3368848D1 (en)
SE (1) SE443485B (en)
WO (1) WO1984001259A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8403968D0 (en) * 1984-02-15 1984-03-21 Heraeus Gmbh W C Chip resistors
US4771260A (en) * 1987-03-24 1988-09-13 Cooper Industries, Inc. Wire bonded microfuse and method of making
GB2248345B (en) * 1990-09-27 1994-06-22 Stc Plc Edge soldering of electronic components
US5258738A (en) * 1991-04-16 1993-11-02 U.S. Philips Corporation SMD-resistor
US5852397A (en) * 1992-07-09 1998-12-22 Raychem Corporation Electrical devices
EP0766867B1 (en) * 1994-06-09 2002-11-20 Tyco Electronics Corporation Electrical devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1236580A (en) * 1967-12-20 1971-06-23 Sangamo Weston Improvements in or relating to electrical resistors
AU5999669A (en) * 1969-08-25 1971-03-04 Technograph Limited Improved plated through hole printed circuit boards
FI52780C (en) * 1974-06-18 1977-11-10 Paramic Ab Oy Resistance network with adjustable resistance value.
US4032881A (en) * 1976-02-06 1977-06-28 Bourns, Inc. Resistance element with improved linearity and method of making the same
US4228418A (en) * 1979-03-28 1980-10-14 The United States Of America As Represented By The Secretary Of The Army Modular trim resistive network
DE3008143C2 (en) * 1980-03-04 1982-04-08 Ruwel-Werke Spezialfabrik für Leiterplatten GmbH, 4170 Geldern Process for the production of printed circuit boards with perforations, the walls of which are metallized

Also Published As

Publication number Publication date
SE443485B (en) 1986-02-24
WO1984001259A1 (en) 1984-03-29
SE8205343D0 (en) 1982-09-17
EP0119241A1 (en) 1984-09-26
DE3368848D1 (en) 1987-02-05
JPS59501566A (en) 1984-08-30
SE8205343L (en) 1984-03-18

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Inventor name: BJOERKLUND, FRITZ, LARS, GUNNAR

Inventor name: OLOFSSON, LARS, ANDERS