Company Filing History:
Years Active: 1977-1989
Title: Innovations of John F. MacDowell
Introduction
John F. MacDowell is a notable inventor based in Painted Post, NY (US). He has made significant contributions to the field of materials science, particularly in the development of glass-ceramic substrates and microfoams. With a total of 9 patents to his name, MacDowell's work has had a profound impact on electronic packaging and other applications.
Latest Patents
One of MacDowell's latest inventions is the "Glass-ceramic substrates for electronic packaging." This invention focuses on the preparation of glass-ceramic materials that are especially suitable for multilayer substrates used in integrated circuit packages. The glass-ceramics are derived from thermally crystallizable glass, which can be sintered into an integral body at temperatures below 1000°C. This process allows for the concurrent crystallization of BPO4 as the predominant crystal phase. The resulting glass-ceramics exhibit a linear coefficient of thermal expansion between about 30-45 x 10^-7 /°C and a dielectric constant of less than 5. The composition consists of 10-25% B2O3, 20-40% P2O5, and over 50-65% SiO2 by weight.
Another significant patent is for "Hydrogen-containing glass microfoams and gas-ceramics." This invention involves the preparation of glass microfoams and gas-ceramics with specific compositions selected from various oxide systems. The foams contain hydrogen-generating cells produced by including a hydrogen-generating agent in the batch, which can be ammonium salts or a combination of amines, carbohydrates, and hydrocarbons with phosphates.
Career Highlights
John F. MacDowell is currently associated with Corning Glass Works, a leading company in the glass and ceramics industry. His work has contributed to advancements in materials that are crucial for modern technology.
Collaborations
MacDowell has collaborated with notable coworkers such as George Halsey Beall and Mark P. Taylor. Their combined expertise has furthered the development of innovative materials and technologies.
Conclusion
John F. MacDowell's contributions to the field of materials science through his patents and collaborations highlight his role as a significant inventor. His work continues to influence the development of advanced materials for various applications.