EP1929485A1 - Verfahren zur herstellung eines elektrischen bauelements mit einer niedrigen toleranz - Google Patents
Verfahren zur herstellung eines elektrischen bauelements mit einer niedrigen toleranzInfo
- Publication number
- EP1929485A1 EP1929485A1 EP06791394A EP06791394A EP1929485A1 EP 1929485 A1 EP1929485 A1 EP 1929485A1 EP 06791394 A EP06791394 A EP 06791394A EP 06791394 A EP06791394 A EP 06791394A EP 1929485 A1 EP1929485 A1 EP 1929485A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- area
- electrode
- base plate
- substrate
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 26
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000002161 passivation Methods 0.000 claims description 27
- 230000004888 barrier function Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 238000001465 metallisation Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000004922 lacquer Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000002966 varnish Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- -1 AgPd Substances 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
Definitions
- a method for producing an electrical component is described.
- NTC Negative Temperature Coefficient
- An object to be solved is to provide a method for producing an electrical component with low tolerances.
- the component may in particular be a resistance component.
- the device is at least one functional unit such.
- an NTC resistor a PTC thermistor or a varistor realized.
- the component comprises a base body with at least two electrodes.
- the main body is preferably a sintered ceramic body.
- the basic body of the component is produced starting from a substrate which is singulated to form a plurality of basic bodies.
- the actual parameters (in particular the specific resistance and the thickness) of the substrate, which later forms the basic body of a component to be produced, can each differ, for production reasons, from a corresponding predetermined value, which was calculated for the electrical size of the component to be achieved.
- the actual value of the electrical size of the construction elements deviates from the specified setpoint.
- the area of a device region may be adjusted at the actual parameters of the substrate to achieve the electrical size setpoint. For example, with an actual substrate thickness that is higher relative to the nominal value of the substrate thickness, the area of the component regions may be smaller than the corresponding nominal value of the surface and vice versa, the area of the component regions may be selected to be larger given a smaller substrate thickness relative to the nominal value of the substrate thickness. Due to the adaptation of the area of the component regions, in spite of the manufacturing error during the production of the substrate, essentially the nominal value of the volume relevant for the achievement of the desired value can be achieved.
- a base plate which has a substrate, a first large-area electrode and a second large-area electrode.
- the large-area electrodes are arranged on main surfaces, ie on the base and top surfaces of the substrate.
- the dimension of the base plate is in two mutually perpendicular lateral directions a multiple of the corresponding dimension of a provided device region.
- a cover area of a component area necessary to achieve the SOI resistance value is calculated.
- the base plate is singulated, wherein cut out for the preparation of the device from the base plate of the component area with the calculated top surface becomes .
- the baseplate is preferably divided into a two-dimensional arrangement of similar component regions with the calculated top surface and singulated according to this division into separate component regions.
- the specified method is intended in particular for producing an SMD-capable resistor element.
- the separated component region forms a basic body provided with electrodes of the component to be produced. After the separation of the base plate, a first or a second electrode of the component is formed from the large-area first and second electrodes.
- the base plate is made by sintering a large-area substrate, for. Ceramic substrates, and metallizing this substrate to form the large area electrodes.
- a first metallization layer is formed on the upper side of the substrate to form the first large-area electrode
- a second metallization layer is formed on the lower side of this substrate to form the second large-area electrode.
- These layers are z. B. applied as a metal paste on the main surfaces of the substrate and baked.
- These layers can preferably be plated by electroplating or by sputtering to form a barrier layer before or after singulation of the baseplate.
- the nickel-plated electrodes can be used in one tinned advantageous variant for forming a solderable layer.
- a barrier layer suitable as a diffusion barrier or a layer sequence comprising a solderable layer and a barrier layer can be produced on the respective electrode.
- the solderable layer preferably contains tin or a tin alloy.
- the barrier layer is arranged between the solderable layer and the corresponding electrode.
- the barrier layer is preferably a nickel-containing layer, the z. B. forms a Ni / Sn barrier.
- the arranged on the opposite faces of the body metallization layers (on each side of the electrode, the barrier layer and the solderable layer) form electrical connections of the device.
- barrier layer and, if necessary, also the solderable layer is preferably carried out before the measurement. But they can also be applied only after the measurement.
- the region of the first and the second outer electrode arranged on the lateral surface or on the underside of the main body respectively forms a contact of the component suitable for surface mounting.
- outer electrodes a material containing a noble metal, in particular silver or a silver alloy, may be used be used.
- the outer electrode may also contain a solderable material or, preferably, as the outer layer, a solderable layer.
- the outer electrode can be tinned in particular.
- An electrically insulating passivation layer can be applied to the outer surface of the main body before the outer electrodes are applied.
- a glass slip can be used.
- Other electrically insulating materials are also suitable for the passivation layer.
- the outer electrodes are preferably applied in such a way that at least a portion of the respective outer electrode lies on the passivation layer.
- the outer electrodes each form an end cap, wherein the side wall of this cap lies on the passivation layer and is held by the layer at a distance from the main body or electrically insulated from it.
- the connection cap thus has areas arranged on the lateral surface of the component. Since the parts of the cap arranged on the lateral surface of the component are electrically insulated from the main body by the passivation, they have no influence on the resistance of the component.
- the use of the passivation layer thus has the advantage that the tolerances associated with the application of the connection cap can essentially be excluded.
- the glass slip is first baked and only then the outer electrodes are applied and baked. But it is also possible, after the application of the glass slip and the outer electrodes together in one Step in to burn.
- FIG. 1 shows the base plate to be singulated in component regions in cross section
- FIG. 2 shows the division of the base plate according to FIG. 1 into component regions
- FIG. 4 shows a component with a passivation layer which separates the parts of external electrodes arranged on the lateral surface from the main body of the component.
- FIG. 1 shows the cross section of a base plate 1, which has a substrate 100 '.
- substrate 100 ' can z.
- B. a ceramic plate can be used.
- a first large-area electrode 211 'and on its underside a second large-area electrode 221' is arranged.
- the large-area electrodes 211 ', 221' are z.
- Figure 2 shows a plan view of the base plate 1 from above. With the dot-dash lines (dividing lines), the division of the base plate into component regions 11, 12, 13,. IN; 21, ...; 31, ...; Ml, M2, M3 ... MN indicated. The base plate 1 is z along these lines. B. isolated by sawing.
- the two-dimensional arrangement of device regions 11... MN forms a matrix of dimension M ⁇ N with M rows and N columns, where N> _ 2 and M j> 2.
- the base plate is therefore a large-area plate whose lateral dimensions are many times larger the lateral dimensions Lx, Ly amount to a provided device area. With x and y are lateral directions and z denotes a vertical direction.
- the main surfaces of the base plate preferably comprise the end faces of the component regions to be separated.
- the thickness of the base plate 1 essentially defines the length of the component to be produced.
- the z-direction thickness of the substrate 100 'and the area Lx x Ly of a device region define the actual resistance of the device.
- the resistance of the substrate region disposed between the first and second large-area electrodes 211 ', 221' is measured at the actual substrate thickness.
- the measured resistance value allows to deduce the resistivity of the substrate material. If the actual resistivity of the substrate material determined from this measurement or the actual substrate thickness deviates from the corresponding ideal value, the area of a component area can be adjusted in such a way that the resistance of the component to be set is achieved.
- FIG. 3 shows a separated component region or component.
- the main body 100 of the device was produced from the substrate 100 '.
- the first electrode layer 211 was formed from the first large-area electrode 211 'and the second electrode layer 221 of the device was generated from the first large-area electrode 221'.
- a barrier layer 212, 222 was applied to the electrode layer 211, 221, and a solderable layer 213, 223 was applied to the latter, preferably galvanically or by sputtering.
- a material for the layers 211, 221 is in particular silver, AgPd, Au, Al, Cu or Cr into consideration.
- the barrier layers 212, 222 are z.
- the surface mount suitable electrical terminals 210, 220 of the device are arranged in this variant on the end sides of the body and each formed by the layer sequence 211, 212, 213 and 221, 222, 223.
- the barrier layer 212, 222 can be applied after the measurement on the two main surfaces of the base plate 1 galvanically or by sputtering. However, it can also be applied to the electrodes 211, 211 only after the separation of component areas. This also applies to the solderable layer 213, 223.
- FIG. 4 shows a component with SMD contacts 51, 52 arranged on its underside. Also in this variant, the electrodes 211, 221 are arranged on the end faces of the basic body 100. A glass slip is preferably applied to the lateral surface of the main body 100 of a separated component region in order to produce a passivation layer 30 in a spraying process. Instead of the solderable layer 213, 223, an outer electrode 41, 42 is used in the variant according to FIG.
- the outer electrodes 41, 42 are preferably formed from a silver-containing and / or solderable material. Each outer electrode can also be several layers, for. As an Ag layer and a Ni / Sn layer. These layers are each, for example, by dipping the respective end face of the body in a metal paste or galvanized.
- the outer electrodes 41, 42 each form an end-side metal cap, wherein the side wall of this cap lies on the passivation layer 30 and is kept at a distance from the base body 100 by this layer or electrically insulated from it.
- the arranged on the underside of the body 100 areas of the outer electrodes 41, 42 form SMD contacts of the device.
- the outer electrodes 41, 42 are generated after the application of the passivation layer 30. It is possible first to burn in the passivation layer 30, then to produce outer electrodes 41, 42 on the base body provided with the passivation layer, to apply at least one metal layer on the face side and burn it. However, it is also possible to successively apply the passivation layer 30 and the metal layer provided for the formation of the outer electrode 41, 42, and to bake both layers together.
- a preferably organic protective lacquer may be applied to these electrodes after the measurement and before the application of the passivation layer 30. which chars in the course of the burn-in of the passivation layer 30.
- the protective lacquer can be applied over a large area to the two main surfaces of the base plate 1. But it can also be applied to the separation of component areas on the end faces.
- the large-area electrodes 211 'and 221' can be removed after the measurement. This can be done before or after the singulation of the substrate, before or after the application and / or burning of the passivation layer 30 z. B. done in a chemical etching process.
- the outer electrodes 41, 42 can then be applied after the application of the passivation layer 30 to the metal-free end sides of the component in this case and the end-side regions of the passivation layer 30.
- the baking of the passivation layer 30 and the outer electrodes 41, 42 can, as already explained, take place in succession or in a baking step.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005046191A DE102005046191A1 (de) | 2005-09-27 | 2005-09-27 | Verfahren zur Herstellung eines elektrischen Bauelements mit einer niedrigen Toleranz |
PCT/DE2006/001660 WO2007036201A1 (de) | 2005-09-27 | 2006-09-20 | Verfahren zur herstellung eines elektrischen bauelements mit einer niedrigen toleranz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1929485A1 true EP1929485A1 (de) | 2008-06-11 |
EP1929485B1 EP1929485B1 (de) | 2017-11-08 |
Family
ID=37663335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06791394.7A Active EP1929485B1 (de) | 2005-09-27 | 2006-09-20 | Verfahren zur herstellung eines elektrischen bauelements mit einer niedrigen toleranz |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1929485B1 (de) |
JP (1) | JP2009510740A (de) |
DE (1) | DE102005046191A1 (de) |
WO (1) | WO2007036201A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE444875B (sv) * | 1981-04-15 | 1986-05-12 | Crafon Ab | Sett att tillverka termistorer |
DE3539318A1 (de) * | 1985-11-06 | 1987-05-07 | Almik Handelsgesellschaft Fuer | Verfahren zur herstellung von elektrischen festwiderstaenden sowie nach dem verfahren hergestellter festwiderstand |
JPS62285401A (ja) * | 1986-06-02 | 1987-12-11 | 株式会社村田製作所 | サ−ミスタの製造方法 |
GB2301223B (en) * | 1995-05-26 | 1999-04-21 | Johnson Electric Sa | Polymeric type positive temperature coefficient thermistors |
DE19623857C2 (de) * | 1996-06-14 | 2002-09-05 | Epcos Ag | Elektrischer Widerstand |
JPH1154301A (ja) * | 1997-08-07 | 1999-02-26 | Murata Mfg Co Ltd | チップ型サーミスタ |
-
2005
- 2005-09-27 DE DE102005046191A patent/DE102005046191A1/de not_active Ceased
-
2006
- 2006-09-20 EP EP06791394.7A patent/EP1929485B1/de active Active
- 2006-09-20 JP JP2008532587A patent/JP2009510740A/ja not_active Withdrawn
- 2006-09-20 WO PCT/DE2006/001660 patent/WO2007036201A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007036201A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2009510740A (ja) | 2009-03-12 |
EP1929485B1 (de) | 2017-11-08 |
WO2007036201A1 (de) | 2007-04-05 |
DE102005046191A1 (de) | 2007-04-05 |
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