Exopack Advanced Coatings presents Tecnilith Amber Film. Coated on a 0.007-inch polyester base. Is said to withstand repeated handling and vacuum-frame draw-downs. Delivers over 1,000 lines/mm. Reported to retain initial image geometry and to duplicate sharply defined images free of graininess. No washing or drying required during development.

www.exopackadvancedcoatings.com

IPC-2152, Standard for Determining Current-Carrying Capacity in Printed Board Design, is for determining the appropriate sizes of internal and external conductors as a function of the current-carrying capacity required and acceptable conductor temperature rise. Replaces IPC-2221 conductor sizing charts. Provides guidance on how thermal conductivity, vias, power dissipation, printed board material and thickness, and the presence of copper planes factor into the relationship between current, conductor size, and temperature. Establishes general guidelines for sizing conductors and contains simple charts that show testing results for both internal and external conductors in air and vacuum environments. Appendix explains how variables impact the temperature rise of a conductor, and presents charts based on copper weights. 97 pages.

IPC, www.ipc.org/onlinestore