Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes. It is also a pickling agent in chrome tanning, and it helps to retard vulcanization of chloroprene in synthetic rubber production. As the conjugate base of a weak acid, a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH. This is useful especially in biochemical applications where reactions are pH dependent. Hot Ice Sodium acetate trihydrate crystals melt at 54°C, to 58°C dissolving in their water of crystallization. When they are heated to around 100°C, and subsequently allowed to cool, the aqueous solution becomes supersaturated. This solution is capable of cooling to room temperature without forming... Less

Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes. It is also a pickling agent in chrome tanning, and it helps to retard vulcanization of chloroprene in synthetic rubber production. As the conjugate base of a weak acid, a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH. This is useful especially in biochemical applications where reactions are pH dependent. Hot Ice Sodium acetate trihydrate crystals melt at 54°C, to 58°C dissolving in their water of crystallization. When they are heated to around 100°C, and subsequently allowed to cool, the aqueous solution becomes supersaturated. This solution is capable of cooling to room temperature without forming... Less

The material in this Field Guide is a distillation of material put together by Chris Mack over the past 20 years, including notes from his graduate-level lithography course at the University of Texas at Austin. This Field Guide details the lithography process, image formation, imaging onto a photoresist, photoresist chemistry, and lithography control and optimization. An introduction to next-generation lithographic technologies is also included, as well as an extensive lithography glossary and a summation of salient equations critical to anyone involved in the lithography industry. Contents - Symbol Glossary - The Lithgraphy Process - Image Formation - Imaging into a Photoresist - Photoresist Chemistry - Lithography Control and Optimization - Equation Summary - Glossary - Index

Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes. It is also a pickling agent in chrome tanning, and it helps to retard vulcanization of chloroprene in synthetic rubber production. As the conjugate base of a weak acid, a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH. This is useful especially in biochemical applications where reactions are pH dependent. Hot Ice Sodium acetate trihydrate crystals melt at 54°C, to 58°C dissolving in their water of crystallization. When they are heated to around 100°C, and subsequently allowed to cool, the aqueous solution becomes supersaturated. This solution is capable of cooling to room temperature without forming... Less

This book elucidates the reasons underlying the lasting success of DNQ/N resist systems by examining the correlation between the chemical structure of the components and the photoresist performance. The basic chemistries of both DNQ sensitizers and novolak resins are explored. Focus also is placed on the chemical basis of application- related facets of the lithographic process. Methods of increasing process performance, such as image reversal, top layer imaging, antireflection layers, and phase shift technology are treated.Contents - Preface to the Series - Table of Contents - Preface - Introduction - Basic Chemistry of DNQ/Novolak Resists - Basic Chemistry of Novolaks - DNQ/Novolak Interactions - Step-by-step View of the Lithographic Process - Advanced Processing Schemes for DNQ Resists... Less

The second Edition of the Handbook of Silicon Wafer Cleaning Technology is intended to provide knowledge of wet, plasma, and other surface conditioning techniques used to manufacture integrated circuits. The integration of the clean processes into the device manufacturing flow will be presented with respect to other manufacturing steps such as thermal, implant, etching, and photolithography processes. The Handbook discusses both wet and plasma-based cleaning technologies that are used for removing contamination, particles, residue, and photoresist from wafer surfaces. Both the process and the equipment are covered. A review of the current cleaning technologies is included. Also, advanced cleaning technologies that are under investigation for next generation processing are covered;... Less

The general trend towards miniaturisation and parallelism in optics and electro-optics has led to a requirement for arrays of sub-millimetre sized lenses. Thus, the demand for these microlens arrays has increased dramatically over recent years. Dan Daly's book describes the technology of microlens arrays and provides a recipe for producing them. It surveys the many fabrication techniques and discusses the numerous applications which either require or enhanced by the use of microlens arrays.This book gives a full description of the processes involved in production and limitations of the techniques. Processes looked at include the Thermal Reflow of Photoresist technique and the Silicon Elastomer Replication Process. As the measurement of microlenses is an intrinsic part of the production... Less