Electronics Forum | Mon Aug 23 10:34:09 EDT 1999 | Greg Jones
I am looking for a rule of thumb regarding the maximum ramp standard components (chip capacitors) can tolerate without failure during the reflow process. The standard seems to be 3C\second, but this figure is generally derived from the average ramp
Electronics Forum | Mon Jul 26 00:20:50 EDT 1999 | HERMAN
| Has anyone had the experience of losing components after they have been placed by the HSP 4796 because of table movement. I've worked on the 4760s, 4780s, and 4785. I don't know if this is a problem or not. We are trying to determine if this a poss
Electronics Forum | Thu Jun 17 11:18:03 EDT 1999 | Ian Clelland
| | | | | | Our company is experiencing cracked caps at our pick and place operations. The caps are being placed onto epoxy dots for subsequent wave solder operations. At present, be have set the pressure of the head at 2 in/lbs. This being down fr
Electronics Forum | Wed May 26 18:04:16 EDT 1999 | John Thorup
| After reflow proces in convection-IR oven we find broken body of SOT23 elements. There is no problems on other elements (SOIC, chip R,chip C, etc) | Where is the problem? | | Thanks in advance! | Check your profile at the site of cracked component
Electronics Forum | Thu Apr 29 17:33:30 EDT 1999 | Steve Gregory
Just curious, Are any of ya'll coming out here to the Chip scale and BGA National Symposium out here in Santa Clara, Cal-i-for-ni-yay next week? I'm a-goin'...gonna learn more about them little buggers...I just know enough now to be extremely dange
Electronics Forum | Thu Apr 29 17:40:40 EDT 1999 | JohnW
| Just curious, | | Are any of ya'll coming out here to the Chip scale and BGA National Symposium out here in Santa Clara, Cal-i-for-ni-yay next week? I'm a-goin'...gonna learn more about them little buggers...I just know enough now to be extremely
Electronics Forum | Wed Apr 07 21:31:25 EDT 1999 | Scott McKee
| DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. | I use tweezers and picks. I place the component down on it's backside (legs up) and manually tweek them un
Electronics Forum | Fri Apr 09 15:41:11 EDT 1999 | Matt Stackhouse
| DOES ANY ONE KNOW HOW I CAN STRAIGHTEN | BENT PINS ON A FINE PITCH QFP WITH OUT DAMAGING | THE CHIP. AT $300 A CHIP I CAN'T SCRAP THEM. Here is a neat trick if you have the equipment. If your company does any feature measurement of mechanical de
Electronics Forum | Mon Mar 22 16:59:15 EST 1999 | B K
| Has any one seen failures of chip resistors after 1-2 years where the junction between the silver termination and the restive element on the top of the ceramic has corroded through. This results in a high resistance failure after this period of tim
Electronics Forum | Sat Mar 20 00:29:07 EST 1999 | Vinesh Gandhi
| | Hi Folks, | | This is my first surface mount board, so I asked our assembly house for some tips. They said only passives on the bottom side-preferably no smaller than 0805, 0603 only if I have to. I would think that an SOT-23 would be OK on the b
