Resistor, particularly SMD resistor, and associated production method
AssigneeIsabellenhütte Heusler GmbH & Co. KG
InventorUllrich Hetzler
Life of this patent
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Abstract
The invention relates to a resistor (18), particularly an SMD resistor, including 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.
Claims30
A resistor comprising:
- a) a flat, electrically and thermally conductive metal support element with an upper side and an underside,
- b) a flat resistor element made of a resistance material, wherein the resistor element is arranged on the underside of the metal support element,
- c) at least two separate metal connection parts, which electrically connect the resistor element and are partially arranged on the underside of the metal support element,
- wherein
- d) the metal connection parts are exposed laterally on the resistor and are visible from the side to be wettable by a solder,
- e) the metal connection parts respectively extend upwards laterally on the resistor to the metal support element and touch and electrically and thermally connect the metal support element, and
- f) the metal support element has an incision, which divides the metal support element into at least two parts insulated electrically from one another and prevents a current flow via the metal support element between the two connection parts.
A process for the production of resistors, comprising the following steps:
- a) providing a flat, electrically and thermally conductive metal support element with an upper side and an underside,
- b) applying a flat resistor element made of a resistance material onto the underside of the metal support element,
- c) electrically connecting the resistor elements by at least two separate metal connection parts, which are arranged partially on the underside of the metal support element,
- wherein:
- d) the metal connection parts are attached to the resistor so that the metal connection parts are exposed laterally on the resistor and are visible from the side to be wettable by a solder,
- e) the metal connection parts are attached to the resistor so that the metal connection parts respectively extend laterally on the resistor upwards to the metal support element and touch and electrically and thermally connect the metal support element, and
- f) an incision is generated in the metal support element, wherein the incision divides the metal support element into two parts and prevents a current flow via the metal support element between the two connection parts.
Dependencies are inferred from the claim text.