Electronics Forum: tombstone on smt (Page 1 of 61)

smt on flexible board

Electronics Forum | Sun Dec 19 10:02:55 EST 1999 | ron chua

Hi, how to ensure flexible boards do not warp after reflow and still remain flat for subsequent operations. What is the best way to hold and transport these strips from one process to another. Thanks!

Re: smt on flexible board

Electronics Forum | Mon Dec 20 07:09:03 EST 1999 | Christopher Lampron

Ron, The simplest way to process fexible PCB's that I have found is to use a process carrier fixture. There are companies that manufacture process carriers that are capable of holding flex through stencil, placement and reflow. The carriers are capab

Re: smt on flexible board

Electronics Forum | Mon Dec 20 17:34:17 EST 1999 | Dave F

Ron: Chris is correct that there is a bunch of fixture fabricators that make good products that will serve your purpose. Other fixture fabricators can be found in the archives. Problems with these fixtures are: 1 Out-rageously expensive 2 Very lo

Re: smt on flexible board

Electronics Forum | Mon Dec 20 19:09:54 EST 1999 | Chris

If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev

Re: Need advice on fixturing a smt LED board

Electronics Forum | Fri Sep 04 09:33:40 EDT 1998 | Stefan W.

| I need advice for locating 23 Gull wing LED's (all in a straight line) in the x,y, and z axis for a SMT PCB. It is a Hewlett Packard LED (P/N HMLA-QH00-01). The application uses a CCD to detect the position of a ball which floats in a resevior fo

Large smt reel bin for machine placement on Mycronics line

Electronics Forum | Wed Nov 16 16:15:31 EST 2022 | babe7362000

Does anyone have a better way of holding large reels for the Mycronics machine? The arms are quite expensive so I currently use an ESD bin with a rod in the middle. It's kind of a pain when you need to change a reel. I saw a really cool bin, but the

Need advice on fixturing a smt LED board

Electronics Forum | Thu Sep 03 15:43:18 EDT 1998 | Tim Flanagan

I need advice for locating 23 Gull wing LED's (all in a straight line) in the x,y, and z axis for a SMT PCB. It is a Hewlett Packard LED (P/N HMLA-QH00-01). The application uses a CCD to detect the position of a ball which floats in a resevior for

smt common pad 0402 and 1206 package

Electronics Forum | Fri May 06 08:39:59 EDT 2016 | kahrpr

The first issue I see is that you have a high potential of the 402 tombstoning.

smt common pad 0402 and 1206 package

Electronics Forum | Fri May 06 08:47:05 EDT 2016 | davef

You're correct. This design will have a record amount of 0402 rework for tombstoning and misalignments. Suggest that the pads on each end of all components be the same size in order to balance wetting forces during reflow.

smt common pad 0402 and 1206 package

Electronics Forum | Mon May 09 09:23:45 EDT 2016 | markhoch

I agree with the previous two replies. This is a perfect design....if you're trying to create a graveyard full of tombstones.

  1 2 3 4 5 6 7 8 9 10 Next

tombstone on smt searches for Companies, Equipment, Machines, Suppliers & Information

Count On Tools, Inc.
Count On Tools, Inc.

COT specializes in high quality SMT nozzles and consumables for pick and place machines. We provide special engineering design service of custom nozzles for those unique and odd components.

Manufacturer

2481 Hilton Drive
Gainesville, GA USA

Phone: (770) 538-0411

Void Free Reflow Soldering

High Resolution Fast Speed Industrial Cameras.
Sell Used SMT & Test Equipment

Nozzles, Feeders, Spare Parts - Siemens, Fuji, Juki, Yamaha, etc...
Voidless Reflow Soldering

High Throughput Reflow Oven
PCB Handling with CE

World's Best Reflow Oven Customizable for Unique Applications


"回流焊炉"