Wednesday, June 25, 2014

Custom Epoxy Vacuum Feedthroughs - A Great Alternative

custom epoxy feedthrough
Epoxy feedthrough on circuit board
Custom epoxy feedthroughs offer some excellent advantages when compared to ceramic and metal seals and should be considered whenever the need for a high integrity feedthrough is required. Below is a rundown of the advantages and specification for epoxy vacuum feedthroughs:

Thursday, June 19, 2014

Low Flow Liquid Mass Measurement Using MEMS Technology Sensor

Size comparison of low mass flow sensor
A low flow sensor, patented by Integrated Sensing Systems Inc. (ISSYS), utilizing silicon MEMS technology provides low mass flow measurement in a package smaller than a dime.

MEMS stands for microelectromechanical systems and is a technology that, in general, is defined as miniaturized mechanical and electro-mechanical elements made using techniques of micro-fabrication.

Tuesday, June 17, 2014

Thermal Mass Flow Controllers and Sensors - An Introduction

Brooks Thermal Mass Flow
Brooks Thermal Mass Flow Meter
Operating upon the thermodynamic principle of differential temperature, thermal mass flow meters combine a flow sensor, a valve, and a PID controller for very accurate and efficient means of controlling gasses and liquid over a wide range of flows.

The following are the primary elements to a thermal mass flow meter:

Friday, June 13, 2014

Common Ways to Electrically Heat a Semiconductor Chuck - The Basics

A semiconductor wafer platform, know as a chuck, is used to support and hold in place (usually by means of applied vacuum), a silicon wafer. A chuck heater is used to uniformly and accurately distribute heat (and cooling) to a semiconductor wafer chuck.  This is done during the manufacturing, characterization, testing, and failure analysis of semiconductor wafers.

Semiconductor wafers contain many electronic devices or electronic circuits, known as dies. Each die has to be carefully tested through a range of temperatures. Precise and uniform temperature control is a requirement. The simplest, and most common way to apply heat (and cooling) is through a chuck incorporating an electric resistance heating element.

Monday, June 2, 2014

Welcome to the The Process Control and Applied Resistance Heat Blog

We're setting off here to provide an informative and interesting place for visitors to learn about the process control industry as well as to educate on applied resistance (electrical) heating.

We have a unique background in both industrial instrumentation and process heating because of our geographic location (Northern California), and because of our product mix which includes pressure, temperature, level, and flow instrumentation, control valves, analytical instruments, as well as engineered electric heating elements, temperature sensors and controls. We also have expertise in a broad array of industries, including:
  • Bio-Tech
  • Chemical
  • Engineering Design Groups
  • Food & Beverage Processing Industry
  • Glass and Coating Industry
  • Industrial & Natural Gas Production & Transportation
  • Mining and Metals Industry
  • Original Equipment Manufacturers
  • Petrochemical / Refining / Petroleum Pipeline
  • Pharmaceutical
  • Power Generation
  • Research / National Labs
  • Semiconductor
  • TMT Cleaning, Repair and Recalibration Services
  • Transportation Industry
  • Water and Waste Water
We plan on providing interesting application notes, custom solutions to challenging process control problems, new product developments and news. We hope you find our information helpful and informative. If you like it, please refer us to your industry friends and peers.