Well...I think we just about beat this one to death, but I'll go ahead and add a couple more points to "pro-score" camp...WITH the caveat that it HAS to be done right! Yes, I will say that I've had to deal with the wrong spec'd or crappy score jobs at one time or another in the past just like a lot of us probably have, and it ain't no fun! You know, a double sided board scored too deep, and the panel falls apart after you got the first side built...fun stuff huh?....or, not scored deep enough so when they're being depanelized, the darn thing delaminates so bad that traces get ripped-up.... that's just peachy ain't it? That's why you need to make sure your fab house can do it correctly. I used to work at a pretty large memory company not too long ago, and we had two, 4-head Kennard routers, and two dual-head machines. When we would get busy (the end of the month or end of the quarter), that was the biggest bottleneck we had in the factory...and we ran 3-shifts too. So we started scoring...and every panel that we converted over to being scored improved the overall cycle time of every other assembly along with shortening it's own...no more bottleneck at the routers because some of the load was being taken off from scoring, which meant boards didn't wait at the routers anymore. Practically every product we built was double sided SMT, we did a lot of PCMCIA flash cards and laptop modems too...all with .020" pitch, and never really had a problem once we got a good fab vendor who had the right scoring machines. There's one company I know of that really are "Guru's" when it comes to scoring, routing, and drilling...that's because that's all they do,...score, route, and drill. The company is called Onanon Inc., there's a gentleman named Dennis Johnson there that really knows his stuff when it comes to scoring. There's more than just a few companies that I know have their fabs drop shipped from their fab vendors to Onanon to get scored. I'll paste a link to their page at the bottom, you should check it out...it's really pretty cool! They've got a animation of one of their actual machines scoring a panel in the page...pretty slick! (but you gotta let it load for a little bit...) -Steve Gregory-
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