Tag Archives: semiconductor

Kalrez 7375® for High Temp Resistance

Kalrez® 7375DuPont™ Kalrez® 7375 FFKM sealing products provide high temperature as well as broad chemical and water/steam resistance properties. Sealing performance, reliability and safety are ensured for applications in the most demanding industrial, chemical and general industrial fields of operation.

These high performance perfluoroelastomer O-ring components are available from Gallagher Fluid Seals, the authorized distributor for a wide range of DuPont™ finished O-rings, as well as custom shapes, sheets and cord sealing components.

The Kalrez® 7375 parts are tailored for specialized chemical applications covering broad operating temperatures from -20°C to 300°C (-4ºF to 572ºF).

These products, which incorporate patented cross-linking technology, combine both superior chemical resistance with a thermal stability which exceeds many other competitive FFKM products. They are also available in most standard O-ring sizes including AS568, metric and JIS, with custom sizes and shapes also available on request.

Continue reading Kalrez 7375® for High Temp Resistance

Parker ULTRA® FFKM for Semiconductor Applications

Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.


Semiconductor FFKM Offers Low Particle Generation AND Extreme Etch Resistance

Semiconductor Manufacturing - FF302In the world of semiconductor manufacturing, performance requirements are driving circuit sizes smaller and smaller, causing increased sensitivity to wafer defects. In parallel, the number of manufacturing steps has also increased driving a need for improved tool utilization and leaving more opportunity for these defects to be introduced. Identifying and eliminating the sources of defects is a tedious but necessary process to improve wafer yield.

What impact does seal contamination make?

One very distinct source of defects are the seals within a fab’s tool. Plasmas involved in both deposition, etch and cleaning processes utilize aggressive chemistries that put even high-functioning perfluorinated sealing compounds to the test. Much room for improvement has been left in this industry with many seal materials still posing significant threats to defectivity or downtime despite being designed for low particle generation or etch resistance.

How can Parker ULTRA change the industry?

Parker’s UltraTM FF302 Perfluorelastomer has proven success in CVD and etch applications, putting this material at the top of its class.  Typically, seal materials for semiconductor applications are optimized for low particulation or extreme etch resistance, however, Ultra FF302 provides both attributes in one material.  Laboratory testing shows Ultra FF302 has lower erosion in aggressive plasma chemistries even when compared to today’s leading elastomeric materials (Figure 1 below shows comparison erosion levels of various etch resistant perfluoroelastmers after exposure to Oplasma).

Continue reading Parker ULTRA® FFKM for Semiconductor Applications

NEW! Elastomer Failure Modes – Part 3

Failure ModesGallagher recently published its Failure Modes of Elastomers in the Semiconductor Industry White Paper, now available for download on our site.  This white paper discusses common issues that occur with elastomer seals in the semiconductor industry. The excerpt below is the third section of our new white paper, discussing O-Ring Stretch, Chemical Attack, Plasma Cracking, and Permeation.  To download the entire white paper, visit our Resources Page, or click on the image to the right.


Failure Modes of Elastomers in the Semiconductor Industry

Failure ModesHigh performance elastomers are found in many applications in the semiconductor industry (see paper titled Perfluoroelastomers in the Semiconductor Industry). Though perfluoroelastomer (FFKM) seals are formulated to meet the highest performance requirements of integrated circuit (chip) manufacturers, even these elastomers can’t solve every sealing application nor will they last forever in service. Additionally, end users need to understand subtle performance differences between perfluoroelastomers in the same product line. For example, one product may be better at minimizing particle generation while another may be better for high temperature services.

Continue reading NEW! Elastomer Failure Modes – Part 3

NEW! Elastomer Failure Modes White Paper

Failure ModesGallagher recently published its Failure Modes of Elastomers in the Semiconductor Industry White Paper, now available for download on our site.  This white paper discusses common issues that occur with elastomer seals in the semiconductor industry. The excerpt below is the first section of our new white paper, discussing groove design and seal leakage.  To download the entire white paper, visit our Resources Page, or click on the image to the right.


Failure Modes for Elastomers in the Semiconductor Industry

Failure ModesHigh performance elastomers are found in many applications in the semiconductor industry (see paper titled Perfluoroelastomers in the Semiconductor Industry). Though perfluoroelastomer (FFKM) seals are formulated to meet the highest performance requirements of integrated circuit (chip) manufacturers, even these elastomers can’t solve every sealing application nor will they last forever in service. Additionally, end users need to understand subtle performance differences between perfluoroelastomers in the same product line. For example, one product may be better at minimizing particle generation while another may be better for high temperature services.

Continue reading NEW! Elastomer Failure Modes White Paper

Semiconductor Manufacturing – Summary

Semiconductor Manufacturing - Wet Processes

NEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing the key reasons to choose perfluoroelastomers over fluoroelastomers for semiconductor manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.

 


Perfluoroelastomers (e.g. Kalrez® parts), often replace fluoroelastomer (e.g. Viton®) in semiconductor applications. However, even though perfluoroelastomers are the highest performance elastomers, there are still subtle differences between products. It is suggested that the elastomer supplier be contacted regarding the optimum product and seal design for specific applications. As mentioned above the key characteristics of perfluoroelastomers include:

  • Lower offgassing than other elastomers, especially at temperatures above 200°C, which lowers the risk of product contamination.
  • Better sealing force retention (lower compression set) at temperatures over 200°C, which is critical for longer service.
    Best overall chemical resistance of any elastomer family.
  • Formulations with extremely low particle generation in aggressive process environments.
  • Generally higher gas permeation than fluoroelastomers.
  • Higher coefficient of thermal expansion when compared to fluoroelastomers. Proper seal design will account for this and optimize performance.

Continue reading Semiconductor Manufacturing – Summary

Semiconductor Manufacturing – Wet Process

Semiconductor Manufacturing - Wet ProcessesNEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing plasma process manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.


Semiconductor Manufacturing - Wet ProcessesAlthough this is a smaller segment of the semiconductor chip manufacturing industry, it still plays an important role. Wet processes can be used in cleaning, etching, and other steps in chip manufacture. Wafers may be cleaned and rinsed after initial wafer preparation. This step removes residual particles and other contamination on the wafer surface. The wafer may then be exposed to chemicals for adhesion promotion and/or photoresist deposition. After photoresist is applied to the wafer surface, the wafer can be exposed to a number of photolithography steps. The wafer may then be exposed to liquid developer solutions and photoresist stripping solutions. Resist strippers usually involve aggressive acids or organic solvents. Finally, wet processes can also be used in etching processes, which typically involve strong acids.

Continue reading Semiconductor Manufacturing – Wet Process

Semiconductor Manufacturing – Thermal Process

Perfluoroelastomers for the Semiconductor IndustryNEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing thermal process manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.


Semiconductor Manufacturing - Thermal ProcessThe term “thermal process” covers a fairly wide range of applications. Per the name, these application temperatures are generally higher than plasma processes, ranging up to 300°C. This general term can cover processes including: Sub Atmospheric Chemical Vapor Deposition (SACVD), Metal CVD, Low Pressure CVD (LPCVD), Rapid Thermal Processing (RTP), and Oxidation or Diffusion furnaces. In these applications the wafers and the equipment that surrounds them, are heated to extremely high temperatures. In the case of thermal deposition, the high temperatures aid in the uniformity of the coating thickness.

Rapid Thermal Processing is used to very rapidly heat a wafer up to temperatures of 1000°C or greater for short periods of time. “Rapid Thermal Processing (RTP) can be used to reduce the thermal redistribution of impurities at high temperature…. RTP was originally developed for ion implant anneal, but has broadened its application to oxide growth, chemical vapor deposition, and silicidation.” For oxidation or diffusion furnaces, the applications are different, but still involve high temperatures. For oxidation applications, the procedure involves formation of a thin oxide film on the wafer surface. For diffusion applications, the furnace may assist in silicon dioxide formation on the wafer surface or it may be used to diffuse dopants in the wafer. For these applications, temperatures may range up to 1200°C.

Continue reading Semiconductor Manufacturing – Thermal Process

Semiconductor Manufacturing – Plasma Process

Plasma Process Manufacturing - Perfluoroelastomers for the Semiconductor IndustryNEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing plasma process manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.


Plasma Process

Plasma Process Manufacturing - Computer Chip In plasma process manufacturing, a remote plasma source generates a plasma gas. Note that this type of process is run in a vacuum environment. This gas is composed of ions, electrons, radicals and neutral particles. The flow of these particles must be carefully controlled for etching, deposition, or ashing/stripping processes. These processes often use oxygen, fluorine, and other exotic plasma gases, which are extremely aggressive to many materials. In addition, cleaning processes often use oxygen plasma. Precise control of the plasma gas in the chamber is critical so processes perform as expected, for all the individual chips, across the entire diameter of the wafer.

In the plasma process, which typically operate under a high vacuum, FFKM seals can be critical for maintaining system integrity and providing a long seal life. The term “long seal life” is relative.  However these seals must perform at high temperatures, up to 250°C, and still maintain low offgassing and low particle generation to prevent contaminating the manufacturing process. In some cases, under extremely aggressive conditions of plasma gases and high temperatures, 6-8 weeks may be considered a long service life for an elastomer seal.

Continue reading Semiconductor Manufacturing – Plasma Process

Basic Semiconductor Manufacturing Process

Perfluoroelastomers for the Semiconductor IndustryNEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper.  You can download it in its entirety by clicking on the thumbnail to the right.


The following is a simplified process chart for chip manufacture in the semiconductor industry:

Basic Semiconductor Process

Following the process shown above:

  1. A silicon wafer has been prepared from an ingot by cutting and polishing. The wafer then has layers of material applied. These include a silicon oxide layer, a silicon nitride layer and a layer of photoresist.
  2. A light is then projected through a reticle and a lens unto the wafer surface. This pattern is projected numerous times onto the wafer for each chip. Continue reading Basic Semiconductor Manufacturing Process

Perfluoroelastomers for the Semiconductor Industry

Perfluoroelastomers for the Semicon IndustryNEW White Paper Available!

Gallagher Fluid Seals has added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper.  You can download it in its entirety by clicking on the thumbnail to the right.


Perfluoroelastomers for the Semicon IndustryThe semiconductor industry, one of today’s major industries, produces integrated circuits (chips) which have found their way into everyday devices from toasters to smartphones to high speed computers.  Integrated circuits are expected to perform operations faster and faster while attaining ever higher levels of reliability. As these chips become more complex and powerful the process for their manufacture becomes more complicated. Years ago a chip may have gone through 100 steps as underlying circuits were constructed.  Now chips may go through more than 400 steps and the complexity of these circuits, and their capability, has greatly increased. This also results in more opportunities for problems during manufacture. Line widths, the width of the electrical pathways, have decreased in order to pack more capacity into each chip. This dictates that contaminants from the production equipment, gas streams, seals, etc., must be essentially eliminated to avoid contamination and chip malfunction.

Continue reading Perfluoroelastomers for the Semiconductor Industry