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Rapid cure for hot melt gasket
STATIC SEALING ~
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Polyimide
hot melt gasket material Beardow Adams has introduced a hot melt adhesive for producing foamed in-place gaskets that cure almost instantly. The Prodas® 1307 material can be used as a replacement for moulded gaskets and moisture-curing polyurethanes, offering reduced costs and more rapid production processes. Prodas 1307 has a temperature resistance of 80 °C, below which it will not slump or deform, and has preferential adhesion to the surface to which it is applied. It also has a high memory, ensuring that it reforms to its original shape after compression, making it ideal for lids and panels that require a water or air tight seal. Hot melt adhesives are a one part, no mix formulation that quickly form a strong bond by spreading their strength over the entire bonding surface. Prodas 1307 is one of several gasketing hot melts that the company produces, each having specific characteristics to suit different production requirements. Depending upon the product selected, they are able to withstand extremes of heat and cold, humidity and chemical attack. Contact: BeatdowAdams, 32 Blundells Road, Bradville, Milton Keynes,MK13 7HF, UK. Tel: +44 1908 315 474; Fax: +44 1908 223 337; E-mail:info@ beardowadams.com
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passes oxide etch test Greene, Tweed & Co reports how a major semiconductor manufacturer evaluated the performance of Greene, Tweed's new Ahymid ® 750 polyimide material. Polyimide materials are widely used in processing cbambers because of their broad chemical resistance and dielectric properties. The performance of such materials in etching chambers depends on their chemical composition, as well as dielectric and physical properties. The techniques used to mould the polyimide material play an important role in ultimate performance, higher physical properties do not necessarily translate into better performance. The study and testing of these materials can lead to improved process performance, and a higher return on investment. The DRAM manufacturer tested Greene, %veed's polyimide material against their existing clamp rings in a chamber running oxide etch process. The objective of the evaluation was to find a material that was readily available, would reduce cost, and provide higher pedbrmancc.
The results showed that there was no substantial difference in particle generation between the two materials, though the Altymid 750 material significantly outperformed the second material in numbers of wafers run, as well as RF hours. Although both materi~s had the same chemical structure, there was a difference in performance due to the proprietary moulding technique used to process Altymid 750. Contact: Greene, Tweed & Co, 2075 Detwiler Road,Kulpsville,PA 194430305, USA.Tel: +I 215 2569521; Fax: +I 215 2560189.
Advanced gasket seals aluminium engines Dana Corporation's Victor Reinz has developed a 'web lace flange' gasket which is designed to seal high power, high performance engines that have both engine block and cylinder heads made from aluminum. The combination of high power output, aggressive driving often at high I~,PM, and an aluminium block several times the mass of the aluminium beads creates major challenges in engine sealing. Expansion and contraction of the head and block, thermal motion and engine flexing are all mucb greater than with a traditional cast iron engine. The cylinder head gasket must be able to contain combustion, control oil and coolant flows, accommodate exu'eme block and head motion, and withstand high pressures and very high operating pressures on a regular basis. The unique Nitroseal T M gasket developed to seal the engine under these conditions employs a perforated steel core whicb is mechanically clinched to graphite facings on both sides. A stainless
SealingTechnologyNo. 56
Rapid cure for
.
-
-
-
:
:
.......
.
.
~
Polyimide
hot melt gasket material Beardow Adams has introduced a hot melt adhesive for producing foamed in-place gaskets that cure almost instantly. The Prodas® 1307 material can be used as a replacement for moulded gaskets and moisture-curing polyurethanes, offering reduced costs and more rapid production processes. Prodas 1307 has a temperature resistance of 80 °C, below which it will not slump or deform, and has preferential adhesion to the surface to which it is applied. It also has a high memory, ensuring that it reforms to its original shape after compression, making it ideal for lids and panels that require a water or air tight seal. Hot melt adhesives are a one part, no mix formulation that quickly form a strong bond by spreading their strength over the entire bonding surface. Prodas 1307 is one of several gasketing hot melts that the company produces, each having specific characteristics to suit different production requirements. Depending upon the product selected, they are able to withstand extremes of heat and cold, humidity and chemical attack. Contact: BeatdowAdams, 32 Blundells Road, Bradville, Milton Keynes,MK13 7HF, UK. Tel: +44 1908 315 474; Fax: +44 1908 223 337; E-mail:info@ beardowadams.com
(~)
passes oxide etch test Greene, Tweed & Co reports how a major semiconductor manufacturer evaluated the performance of Greene, Tweed's new Ahymid ® 750 polyimide material. Polyimide materials are widely used in processing cbambers because of their broad chemical resistance and dielectric properties. The performance of such materials in etching chambers depends on their chemical composition, as well as dielectric and physical properties. The techniques used to mould the polyimide material play an important role in ultimate performance, higher physical properties do not necessarily translate into better performance. The study and testing of these materials can lead to improved process performance, and a higher return on investment. The DRAM manufacturer tested Greene, %veed's polyimide material against their existing clamp rings in a chamber running oxide etch process. The objective of the evaluation was to find a material that was readily available, would reduce cost, and provide higher pedbrmancc.
The results showed that there was no substantial difference in particle generation between the two materials, though the Altymid 750 material significantly outperformed the second material in numbers of wafers run, as well as RF hours. Although both materi~s had the same chemical structure, there was a difference in performance due to the proprietary moulding technique used to process Altymid 750. Contact: Greene, Tweed & Co, 2075 Detwiler Road,Kulpsville,PA 194430305, USA.Tel: +I 215 2569521; Fax: +I 215 2560189.
Advanced gasket seals aluminium engines Dana Corporation's Victor Reinz has developed a 'web lace flange' gasket which is designed to seal high power, high performance engines that have both engine block and cylinder heads made from aluminum. The combination of high power output, aggressive driving often at high I~,PM, and an aluminium block several times the mass of the aluminium beads creates major challenges in engine sealing. Expansion and contraction of the head and block, thermal motion and engine flexing are all mucb greater than with a traditional cast iron engine. The cylinder head gasket must be able to contain combustion, control oil and coolant flows, accommodate exu'eme block and head motion, and withstand high pressures and very high operating pressures on a regular basis. The unique Nitroseal T M gasket developed to seal the engine under these conditions employs a perforated steel core whicb is mechanically clinched to graphite facings on both sides. A stainless
SealingTechnologyNo. 56