3M Paper Addresses Moisture-Induced Stress in Board Assembly Operations.Business Editors/High-Tech Writers AUSTIN, Texas--(BUSINESS WIRE)--April 25, 2003 A paper on avoiding mechanical damage, such as die delamination delamination /de·lam·i·na·tion/ (de-lam?i-na´shun) separation into layers, as of the blastoderm. de·lam·i·na·tion n. 1. A splitting or separation into layers. 2. , resulting from moisture-induced stress during assembly solder reflow (1) The process of heating and melting the solder that has been screen printed onto a printed circuit board in order to bond chips and other components to the board. Surface mount chips (SMT) use the reflow method. Contrast with wave soldering. See also reflowable text. will be presented at the Chicago/Milwaukee Regional IMAPS IMAPS IMAP (Internet Message Access Protocol) Secure IMAPS International Microelectronics And Packaging Society IMAPS Interstellar Medium Absorption Profile Spectrograph IMAPS Integrated Military Airlift Planning System (MAC) Symposium on April 30 in Schaumburg, Ill. "Material Set Comparison in Moisture Sensitivity Classification of Nonhermetic Organic Packages" was written by William R. Schildgen, materials engineer, 3M Microinterconnect Systems Division, and Cameron T. Murray, product development specialist, 3M Electronic Markets Materials Division. Schildgen will make the presentation. The choice of materials and optimization of process parameters can significantly influence the moisture sensitivity classification of chip packages. This paper directly compares two types of heat spreaders and two types of adhesives used in a cavity-down, nonhermetic, organic wire bond package. The paper was first presented at IMAPS 2002 in Denver, Colo. To read the paper in its entirety, go to www.3M.com/multilayer. 3M Microinterconnect Systems Division provides custom, high-performance flexible circuits for today's demanding electronics applications, including ink-jet printers, hard disk drives, optoelectronics, liquid crystal displays liquid crystal display (LCD) Optoelectronic device used in displays for watches, calculators, notebook computers, and other electronic devices. Current passed through specific portions of the liquid crystal solution causes the crystals to align, blocking the passage of light. , medical, bio-analytical, IC packaging and other fine-pitch interconnect applications. 3M's technology, materials and process expertise enable its offering of circuits with one- and two-metal layer construction and liquid crystal polymer Liquid crystal polymers (LCPs) are a unique class of wholly aromatic polyester polymers that provide previously unavailable high performance properties. In particular, they are highly inert chemically and highly resistant to fire. or polyimide Pronounced "poly-ih-mid." A type of plastic (a synthetic polymeric resin) originally developed by DuPont that is very durable, easy to machine and can handle very high temperatures. Polyimide is also highly insulative and does not contaminate its surroundings (does not outgas). substrates. The division also supplies high-density, multilayer interconnect solutions for electronics and photonics packaging. These high-density laminated chip packages provide breakthrough density and outstanding electrical performance optimized for ASICs in high bandwidth and networking applications. About 3M 3M is a $16 billion diversified technology company with leading positions in consumer and office; display and graphics; electronics and telecommunications; health care; industrial; safety, security and protection services; transportation and other businesses. Headquartered in St. Paul St. Paul as a missionary he fearlessly confronts the “perils of waters, of robbers, in the city, in the wilderness.” [N.T.: II Cor. 11:26] See : Bravery , Minnesota, the company has operations in more than 60 countries and serves customers in nearly 200 countries. 3M is one of the 30 stocks that make up the Dow Jones Industrial Average Dow Jones Industrial Average The best known U.S. index of stocks. A price-weighted average of 30 actively traded blue-chip stocks, primarily industrials including stocks that trade on the New York Stock Exchange. and also is a component of the Standard & Poor's 500 Index. For more information about 3M, go to www.3M.com. 3M is a trademark of 3M Company. |
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