Wika Alexander Wiegand SE and Co. KG

Klingenberg am Main, Germany

Wika Alexander Wiegand SE and Co. KG

Klingenberg am Main, Germany
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Schwanitz K.,WIKA Alexander Wiegand SE and Co. KG | Langenschwarz M.,WIKA Alexander Wiegand SE and Co. KG | Fricke O.,WIKA Alexander Wiegand SE and Co. KG
IEEE International Symposium on Semiconductor Manufacturing Conference Proceedings | Year: 2017

In this paper a simple approach is demonstrated for spatially selective etching of a silicon nitride layer by Reactive Ion Etching (RIE) by using a reusable shadow mask as a separate solid component part. Two ceramics were applied as mask materials: aluminum oxide and boron nitride. After the usage of an aluminum oxide mask several times, the deposition of small aluminum fluoride particles is observed. In contrast, using a boron nitride mask, a RIE process without any residuals on the surface can be accomplished. Furthermore, cutting a shadow mask out of bulk material, containing a three dimensional structure, is feasible. © 2016 IEEE.


Ulrich C.,Linköping University | Dan L.,MPV Sensors AB | Martensson P.,MPV Sensors AB | Kluftinger A.,WIKA Alexander Wiegand SE and Co. KG | And 2 more authors.
Talanta | Year: 2012

In this paper we explore the combination of electrochemical impedance spectroscopy (EIS) and multivariate data analysis to evaluate the concentration and pH of an industrial cutting fluid. These parameters are vital for the performance of for instance tooling processes, and an on-line quality monitoring system would in such applications be very beneficial. It is shown that both the total impedance and the phase angle contain information that allows the simultaneous discrimination of the concentration and the pH. The final evaluation was conducted using the regression technique partial least squares (PLS), and this approach provided a way to quickly and easily find the correlation between EIS data and the sought parameters. The possibility to estimate both the concentration and pH level clearly indicates the potential of this method to be implemented for on-line evaluation. © 2012 Elsevier B.V. All rights reserved.


Temperature is by far the most measured quantity (over 30% of the measurements relate to temperature) in the facilities of big industry. The temperature measurement requires thermometers adjusted to the requirements of their use. The core of an electrical thermometer is its temperature transmitter, the selection and specification of which are often difficult for the planner and user because the temperature transmitter is the interface between process (sensor) and process control and evaluation system. The discussion gives manufacturer-neutral recommendations and serves as a guide for practice. Topics include introduction; protection from explosions; functional safety (safety integrity level, SIL); output signals and communication protocols; simple and clear handling; and summing up. Besides the relatively obvious requirements of thermometers such as resistance to vibrations and pressure, corrosion resistance, and connection geometry, there are many layered requirements that relate to the built-in temperature transmitter. Some of these specific underestimated requirements include explosion protection (Atex), functional safety (SIL), standardized output signals, such as 4...20 m amps, and protocols (Hart and Field bus) and their connection into the process control systems, and simple handling and operation if possible of the temperature transmitter. Questions to ask of a given temperature transmitter (in most cases a SIL2 level is reached) include whether the temperature transmitter is suitable for SIL applications; for which SIL level is it applicable; whether redundant system are possible with the temperature transmitter; which probability of failure on demand (PFD) values/safe failure fraction (SFF) values does the transmitter offer with which sensor/sensor connection; and which TProof interval values are provided where the TProof interval describes the recurring function testing. To connect the digital protocols Hart, Profibus PA, and Foundation Fieldbus into existing asset management systems there are two competing technologies. One is the EDD- (electrical device description) and the other is the FDT (field device type). Some asset management systems support only EDD technology and some others support only FDT technology. It is advantageous for a temperature-transmitter to support both systems.


Meckl M.,WIKA Alexander Wiegand SE and Co. KG | Rossner E.,WIKA Alexander Wiegand SE and Co. KG
Olhydraulik und Pneumatik | Year: 2011

O+P Issue 4/2011 reported on pages 146 to 150 about the basics of mechanical pressure measurement technology as well as measurement precision. In O+P Issue 5/2011 on pages 215 to 217 mechanical pressure measurement devices with electrical signal output, switch contacts and transmitters were presented and typical measurement tasks were shown. The continuation of this technical contribution gives pointers for the selection of the right measurement device and goes into technical specifications, standardization, guidelines and laws.


Samac K.,University of Leoben | Zirkel H.,WIKA Alexander Wiegand SE and Co. KG
Productivity Management | Year: 2015

If lean management should be applied throughout the company, it is important to raise awareness amongst all employees. WIKA has developed a training programme in which lean management is brought closer to all participants. This is best maintained if methods are applied with hands on exercises, seeing and understanding of improvements lean management is not just a theory. © 2015, GITO Verlag. All rights reserved.


Meckl M.,WIKA Alexander Wiegand SE and Co. KG | Rossner E.,WIKA Alexander Wiegand SE and Co. KG
Olhydraulik und Pneumatik | Year: 2011

In O+P 4/2011, on pages 146-150, some fundamentals of the mechanical pressure measurement technology as well as information about measurement precision were conveyed alongside a historical backgrounder. The continuation of this technical paper introduces mechanical pressure measurement devices with signal output, switch contacts and transmitters. Furthermore, typical measurement tasks will also be shown.

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