Conductive Adhesives for Electronics Packaging - editor: Johan Liu by Brian Ellis Wow! Now this is a book! I can say categorically that, until there is a radical technology change, this is the definitive work on electrically conductive adhesives. So, let's start by mentioning some of the weaknesses (yes, it has a few!). Like all books written by several authors, it is very difficult for the editor to provide a seamless assembly. In this case, there are 18 chapters, written by 24 authors from three continents. There are therefore quite a number of repetitions and, dare I say it?, even a few cases where opinions may diverge. Many of the authors are not of English mother-tongue, but the quality of the edition is such that one would never guess it.
A New Light-Weight Electronic Packaging Technology Based On Spray-Formed Silicon-Aluminium by David M. Jacobson, Materials Consultant A new family of silicon-aluminium (Si-Al) alloys has been developed for electronic applications. These alloys are produced using the Osprey spray deposition process which achieves homogeneous and isotropic properties. Their advantageous physical characteristics, combining low thermal expansivity, high thermal conductivity, and low density make them particularly attractive for packaging of avionics, including RF and microwave circuitry. These alloys are easy to machine to tight tolerances using standard machine tools and they can be electroplated with gold, silver or nickel finishes without difficulty. Being non-toxic, they do not require any special handling.
Microwave amplifier modules designed for space applications have been successfully produced and tested. The packages have gold-plated Si-Al bases and kovar side-walls, supplied with appropriate r.f. and d.c. feedthroughs. The lids are laser-welded by conventional seam sealing. This package configuration provides rigid bases for the circuitry and a weight saving of typically 30% over all-kover packages.
HASL: What a Hassle, or HASL'd Again by Earl Moon - Proof Of Design (POD) This article updates one I wrote for Printed Circuit Fabrication Magazine in December 1991. Actually, this article trashes that - and about time. I was much too kind then talking about how to control the HASL process. I really couldn't say it was uncontrollable, as no one, at that time, would have believed such an "advanced", save us all technology could be flawed. Well, it's time to dispel that bunk though some still love the stuff, and there are many staunch defenders selling equipment and process elements as well as those using its effects.
Proof Of Design a continuing column (saga) by The MoonMan
Installment 3: DFM/CE Design Development Phases
Sticking it where you didn't expect, eh? That's my future ex boss floating in space (he also hung out there with other space junk, but much too often) with a little reminder from the MoonMan and DFM/CE. It should be noted I stuck it to him, but I didn't do any serious harm - you know what I mean? Hell, I didn't deflate his space suit - only a little ego.
Sure, that's me now. MoonMan survived the stupid boss trick and has become capable of moving about the universe unencumbered while experiencing minor breathing problems (gasp!) and those associated with irregular paychecks. Wonder if that makes peristalsis irregular too? Only if I can't eat, I guess.
AH, FREEDOM TO GO WHERE AND DO AS I CHOOSE - WERE IT NOT FOR RULES Often I travel about my little corner of the universe, leaving one contract for another. I've already seen all our planets and galaxy. Don't be surprised. I am the MoonMan. Doing so, a feeling of freedom wells up inside. It is almost like sex was at one time (what time is it?), or was that love? Damn, wish I could remember all I forgot.
Traveling this way often provides an opportunity to explore the back roads (when not forced onto a "super-slab" at 80 + miles an hour). I can describe it no better than those of you so fortunate. It's like being liberated from all care, for a time, allowing sights never before seen to excite all senses. Even though the vistas and feelings probably were experienced many times before, it's always great to "get away from it all" - especially the rules.
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