, (With apologies to those out of the area, I hesitated on posting this here but many who deal with SI also have concerns with heat) Thermal Management on PCBs The Greater Boston Chapter of the IPC Designer's Council is holding its next meeting on Thursday, Feb 15th at 6pm in the conference room at iRobot in Burlington MA. Brad Saunders, of Selmark, will present on the implications of Thermal Management on PC Boards. This topic will discuss choosing methods ie conduction versus convection, and impact of using heavy copper. Other common ways to facilitate the movement of thermal energy will be covered, such as the use of thermal grease or Sil-Pads, and thermally conductive lam- inates. Compatibility of various methods with product goals must be reviewed carefully, as choices desired for carrying heat (or power) often must be compromised in the presence of fine geometry components. Mr Saunders is Military Markets Manager for Selmark, a New England Region manufacturer's rep firm. While new to this position, he has held numerous key roles in all aspects of the PWB industry, including commercial and military orien- tations on both sides of the vendor/oem table. Agenda: 6:00 pm, Arrivals/Pizza, $5 meeting fee 6:30 Jeff Seeger - Chapter Update 6:45 Brad Saunders, Thermal Management Location: iRobot, 63 South Ave, Burlington MA. Directly across from the Burlington Mall just off of Middlesex Turnpike; South Ave has Long's Jeweler's on the corner. As you proceed up South Ave, iRobot's front door is at the first left. RSVP's needed: Please RSVP to Jeff Seeger jseeger@xxxxxxxxxxxxxx , if you are bounced by a spam blocker please rsvp to Janice Lund jlund@xxxxxxxxxx by Thursday noon, 15-Jan. We need this in order to plan the refreshments. President's Note: As performance increases, so do power and therefore heat. Managing these along with the densities of modern parts is only becoming more intricate. Heatsink in air, or thermal plane? Multiple plane layers, or heavier copper? How to use thermal vias in a heat slug or with a .8mm pitch BGA? How do you heatsink to a chassis ground without tying your system ground to it? How much power or heat can we really count on handling? We face these tradeoffs every day. Is there a better way? We are looking forward to bringing further timely and en- gaging topics, including Regulatory Compliance, RoHS, and the demands placed on boards by ever-finer geometries. Mission: The physical design of circuit boards is only getting more complex. Only the physical designer can hope to sort out the myriad interests that add up to a printed circuit board. The Greater Boston Chapter of the IPC Designer's Council is trying to bring the stake holders from every discipline, to show you their problems and solutions so you can add to your arsenal of knowledge. Your help and participation would be most appreciated, how about getting involved! Thanks and regards, Jeff Seeger, CTO, Applied CAD Knowledge Inc. President, Greater Boston Chapter, IPC Designer's Council ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu