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Resistor, particularly SMD resistor, and associated production method

A manufacturing method and technology of resistors, applied in the direction of resistors, resistance terminals/electrodes, non-adjustable metal resistors, etc., can solve the problems of low thermal expansion coefficient, low thermal conductivity, harmful effects of total resistance, etc.

Inactive Publication Date: 2009-07-15
ISABELLENHUTTE HEUSLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, the disadvantage of this type is that the substrate is made of ceramics and therefore has relatively low thermal conductivity and low thermal expansion coefficient compared to copper (compare Fig. 4) or aluminum (compare Fig. 5), making it difficult to apply to common circuit boards
Furthermore, here the resistive film is located on the upper side of the substrate, which has a detrimental effect on the aforementioned overall resistance

Method used

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  • Resistor, particularly SMD resistor, and associated production method
  • Resistor, particularly SMD resistor, and associated production method
  • Resistor, particularly SMD resistor, and associated production method

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Embodiment Construction

[0048] figure 1 The cross-sectional view shows an SMD resistor 18 according to the invention, which may be of the 0604 type, for example. This means that the SMD resistor 18 has a length of 0.06 inches (1.524 mm) in the X direction and a width of 0.04 inches (1.016 mm) in the Z direction. Furthermore, the SMD resistor 18 may have a thickness of, for example, 0.4 mm in the Y direction.

[0049] The SMD resistor 18 has a planar support element 19 made of copper, a resistive film 21 of copper manganese nickel alloy (CuMn12Ni) adhesively bonded to the underside of the support element 19 by means of an adhesive layer 20 . On the one hand, the adhesive layer 20 fixes the resistive film 21 on the underside of the planar carrier element 19 . On the other hand, the adhesive layer 20 is electrically insulating and thus insulates the conductive support element 19 from the resistive film 21 .

[0050] Furthermore, the SMD resistor 18 has cap-shaped connection parts 22 , 23 on either si...

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Abstract

The invention relates to a resistor (18), particularly an SMD resistor, comprising a planar, metallic support element (19) that has a top surface and a bottom surface, a planar resistor element (21) which is made of a resistive material and is disposed on the bottom surface of the support element (19), and at least two separate metallic connecting parts (23, 23) which electrically contact the resistor element (21) and are arranged in part on the bottom surface of the support element (19). The connecting parts (22, 23) are laterally exposed on the resistor (18) and can be laterally wetted in a visible manner by a solder. The invention further relates to a corresponding production method.

Description

technical field [0001] The invention relates to a resistor, in particular an SMD resistor, and a corresponding manufacturing method according to the corresponding claims. Background technique [0002] Fig. 4 shows an exemplary embodiment of a conventional SMD (Surface Mount Device) resistor 1, which has been marketed by the applicant and which has been described in a similar form eg in German Patent 43 39 551 CI. A known SMD resistor 1 comprises a planar metal base 2 which may be made of eg copper. An electrically insulating adhesive layer 3 is applied to the upper side of the substrate 2 during the manufacturing process and is thereafter used to bond the resistive film to the upper side of the substrate 2 . The resistive film is thereafter structured by an etching process such that meandering resistance paths 4 are formed on the upper side of the substrate 2 . The resistor 1 is thereafter covered by a protective varnish 5 which is electrically insulated from the impedance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/00H01C1/14H01C17/28
CPCH01C17/28H01C7/00H01C1/14Y10T29/49082
Inventor U·黑茨勒
Owner ISABELLENHUTTE HEUSLER