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US 6,686,828 B2Granted
High-temperature detector and method of producing the same
OwnerGeorg Bernitz, Heinrich Zitzmanninventors
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OwnerGeorg Bernitz, Heinrich Zitzmanninventors
Estimating the term…
A high-temperature detector comprises a temperature sensor comprising a high-temperature measuring element, a first connection and a second connection which are made of a high-temperature-stable material and which are connected to the measuring element. The high-temperature sensor is arranged in an elongate housing adjacent a first end thereof, and the housing comprises a first and a second conductor track produced from a high-temperature-stable material, the conductor tracks being connected to the first and second connections and extending in the direction of a second end of the housing. Furthermore, a connection point is provided, which is used for tapping a signal produced by the high-temperature sensor and which is arranged adjacent the second end of the housing. In order to produce such a device, the sensor is first provided and subsequently arranged in an opening of a first substrate adjacent a first end of the substrate. Following this, a second and a third ceramic substrate are fused with the first ceramic substrate so that the conductor tracks arranged in the second and third ceramic substrates are connected to the connections of the sensor, the conductor tracks extending to a respective second end of the second and third ceramic substrates.
A method of producing a hybrid high-temperature detector comprising
A method of producing a hybrid high-temperature detector comprising
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
The resistive element having zig-zag or sinusoidal configuration: lying in one plane
The element being a linear resistance, e.g. platinum resistance thermometer: characterised by the use of the resistive element
Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids: iron-filament ballast resistors; Other resistors…
Resistor making: thermally variable
Term ended 9 Apr 2022 (estimated)
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1. Field of the Invention
The present invention relates to a high-temperature detector and to a method of producing such a high-temperature detector.
2. Description of Related Art
In the following, preferred embodiments of the present invention will be explained in detail making reference to the drawings enclosed, in which:
FIG. 1 shows a platinum SMD chip;
FIGS. 2a to 2d show the individual ceramic substrates used for producing the housing;
In the following description of the preferred embodiments of the present invention, identical reference numerals are used for identical or similar elements in different figures.
The present invention proceeds from so-called SMD chips which can be produced at a moderate price and which are known for applications in the low temperature range, e.g. up to 150° C., with solderable contacts. For cases of use involving very high temperatures, substantial modifications are, however, necessary for ensuring a reliable protection of the platinum resistance layer in adverse ambient conditions (preventing problematic foreign matter from diffusing into the platinum) so as to guarantee reliable contacting of the electric leads for the measurement current. Special attention should be paid to the fact that the materials used should only be suitable materials which will not be decomposed electrochemically by the necessary measurement current at the aimed-at high temperatures which are used.
To begin with, a suitable SMD chip is to be produced, which differs from conventional embodiments insofar as the platinum film, which is applied to a ceramic substrate and which has already been patterned, is not covered by a protective glaze and insofar as the contacting areas do not consist of silver or a silver alloy (e.g. Ag/Pd) but of pure platinum.