Semiconductor

When to select the perfect regulator. Understanding design parameters of pressure regulators in gas or fluid line systems.

Selecting the correct filter for the application should be approached from a methodical, questioning angle. If filters are application specific, meeting filtration specifications, physical and chemical conditions of the process must be considered before selecting the filter for the application.

This white paper explains the differences between oil lubricated and oil-free compressor technologies, the contamination risks associated with each, and how to mitigate those risks by installing the correct purification equipment required to deliver clean, dry, “Technically Oil-free Compressed Air”.

Within any of the semiconductor manufacturing processes that utilize gases, filtration is one of the most critical elements. Whether discussing inert or specialty gases, this holds true from the bulk source all the way through to the final point of use. In this white paper you will learn about recent improvements in filter performance that have come to the forefront in just the last couple years.

Ideally, stepper motors should operate smoothly without vibration throughout all speed ranges. In reality, they run with some vibration at low, mid, or high speeds, causing unwanted noise. This type of vibration is called "rotation vibration" and developing the suppression system for the rotation vibration is a major challenge.

Mechanical rotary power given from a motor must be driven by an appropriate amount of electrical power provided by the drive. Rotary power is provided for by the electrical input power and the rotary power cannot exceed the electrical. Therefore, it is important to verify the power throughout the system from power supply all the way to the motor or gearbox output shaft.

The use of INPUT/OUTPUT software filters can provide enhanced performance of controllers to process systems conditions. The use of Input filters are to reduce the erratic fluctuations of the analog input signal due to either electrical “noise” conditions or rapid fluctuations of the analog input signal. It accomplishes this by slowing down the response of the analog input to a change.

Occasionally questions come up with regard to calibration of Watlow controllers. This paper will attempt to address some of the more common questions on this subject. Many people want to jump in right away and begin performing a calibration procedure before verification. Before you would attempt to calibrate a Watlow controller, verify that the controller is in need of calibration. If you verify that readings of the controller first, you may not have to go through the more involved process of changing the calibration settings.

Customers who wish to control three phase heaters require power controllers. How do you decide which method of control to select? ‘Two-leg versus three-leg control’ and ‘zero cross versus phase-angle control need to be considered.’ The following will help you decide when each method is appropriate.

In Watlow catalogs, brochures and web pages there is a category of controllers listed as “Limits and Alarms”. It is not always clear to everyone when to use these controllers or which type of controller to use. This document is an attempt to clear up some of these issues.

In today’s world, there is an ever increasing awareness and focus on safety. A system designer needs to understand all aspects of design that can affect the safety and reliability of the system they are implementing.

Graham Johnson, EMEA Product Manager for Parker Veriflo Ultra High Purity Fluoropolymer Valves, looks at the benefits of two point seal valves for semiconductor applications. The corrosive nature of high concentration acids and bases, clear chemistries and slurries used in semiconductor applications mean that pneumatic valves specified for these applications need to be particularly robust.

Operational efficiency is a critical factor in the fluid processing industry. The synergy of fitting components and assembly technology to achieve this objective is the focus of Fit-LINE, Inc. Applying extensive polymer technology and injection molding expertise, the company has analyzed the design, tooling and manufacturing processes required to create high-performance solutions for demanding high-purity fluid processing applications. Through extensive R&D, testing and evaluation, Fit-LINE has isolated three variables that need to be addressed to ensure leak-free fitting assemblies.

The purpose of a filter is to remove contaminants from a fluid stream either completely, or at least down to a given rating or specification. Filters are used to help control contaminants and are rated according to their ability to remove these contaminants from a liquid, gas or air stream. There are different methods in which the performance of filters are specified.