double sided pcb

"double sided pcb" search results in the Electronics Forums



12781 result s found for "double sided pcb" in the Electronics Forums

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PCB Offset

May 3, 2000 | Re: PCB Offset

PCB Offset

May 3, 2000 | Re: PCB Offset

PCB Offset

May 3, 2000 | Re: PCB Offset

PASTE LEACHING

May 3, 2000 | GUYS SEEING A PROBLEM WITH SOLDER PASTE LEACHING. THE PCB IS HASL FINISH , AND THE DEVICE IN QUESTION IS A O.O30" PITCH RESNET. THE SIZE OF THE PADS ARE 0.020 x 0.0.047 THOU , THE APERTURE SIZES ARE 0.018 x 0.042 THOU . THE LEACHING IS OCCURING DUE TO TRACKS RUNNING OF THE PADS . DOES ANYONE HAVE

PCB Offset

May 3, 2000 | Re: PCB Offset

Silver Thru' Hole

Apr 27, 2000 | issues. The PCB manufacturer we use for this finish guarantees a minimum of 12 months shelf life. Pete B.

PCB finishing

Apr 20, 2000 | Re: PCB finishing

ref: tombstoning on chip capacitors

Apr 13, 2000 | /geometries. Things to check: is the pad size correct for this type of component? Is the oven soak time/temperature adequate to allow thermal equalibrium across the PCB. Just my $.02 Chris

Workmanship Standards

Apr 10, 2000 | I need some input to clear up some confusion I have with regards to what standard I should be using for workmanship on the pcb assemblies we produce. Should I be using the IPC 610b or the ANSI-J-STD-001B? What is the norm for the industry or is there one? What about the C versions of the above?

DCA/Wire Bonding/Encapsulation

Mar 29, 2000 | Does anybody out there have experience building electronics assemblies with DCA (Direct Chip Attach - bare die onto PCB) and wire bonding? - What Die Bonder/Dispensing Machines are recommended? - What brand conductive epoxy were used to attach die? - Considerations: fast cure time, etc

Pyroelectric Sensors

Mar 16, 2000 | Does anybody have any experience or knowledge of processing PCB assemblies featuring pyroelectric sensor devices, the type used in Passive Infra-Red Sensor modules? Since these devices are, by definition, very sensitive to heat, how do you get round the problems of using wave solder or reflow

Vias Under Discrete Components

Mar 15, 2000 | Do we really need not to locate vias underneath discrete components on a PCB that will be wave soldered after reflow even though we are using no clean process on our wave solder ? What are the possible cause and effect when locating Vias under discretes? All ideas are welcome... Ta. Armin

Min Hole/Pad distance to edge of PCB

Mar 13, 2000 | Re: Min Hole/Pad distance to edge of PCB

Min Hole/Pad distance to edge of PCB

Mar 13, 2000 | Re: Min Hole/Pad distance to edge of PCB

Min Hole/Pad distance to edge of PCB

Mar 13, 2000 | Assuming agressive design rules what is the minimum distance I can get away with between the board

Min Hole/Pad distance to edge of PCB

Mar 13, 2000 | Assuming agressive design rules what is the minimum distance I can get away with between the board

Use of Wood on PCB Assembly Production floor ??

Mar 10, 2000 | Re: Use of Wood on PCB Assembly Production floor ??

Use of Wood on PCB Assembly Production floor ??

Mar 10, 2000 | Re: Use of Wood on PCB Assembly Production floor ??

footprint formula

Mar 3, 2000 | I have tried the IPC calculator and they do not have this type of component registered. When trying to select 'other' on menu, no connection can be made. The polarity if the QFP has not been decided yet (pre-PCB design) the pitch size of the component is 1.0mm and the lead footprint itself is 2

footprint formula

Mar 3, 2000 | I have tried the IPC calculator and they do not have this type of component registered. When trying to select 'other' on menu, no connection can be made. The polarity if the QFP has not been decided yet (pre-PCB design) the pitch size of the component is 1.0mm and the lead footprint itself is 2

footprint formula

Mar 2, 2000 | could add extra pads only and the end of the component if you know the direction the PCB goes through the wave. M2C Wolfgang

footprint formula

Mar 2, 2000 | could add extra pads only and the end of the component if you know the direction the PCB goes through the wave. M2C Wolfgang

Baking PCB's before Assembly

Feb 28, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 28, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 25, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 25, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 24, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 24, 2000 | Re: Baking PCB's before Assembly

Baking PCB's before Assembly

Feb 24, 2000 | Does anyone have any information on baking boards to remove moisture before reflowing and waving as

Baking PCB's before Assembly

Feb 24, 2000 | Does anyone have any information on baking boards to remove moisture before reflowing and waving as

Recycling of Waste Packing Material

Feb 24, 2000 | We are looking for a source which can accept our packing material ( PVC tubings, Chip Trays, reels and spools , PCB waste rails from depanalization). Anybody, who is currently using a recycling manufacturer for these packing wastes. Our intent is: To be environment friendly. Will prefer

Recycling of Waste Packing Material

Feb 24, 2000 | We are looking for a source which can accept our packing material ( PVC tubings, Chip Trays, reels and spools , PCB waste rails from depanalization). Anybody, who is currently using a recycling manufacturer for these packing wastes. Our intent is: To be environment friendly. Will prefer

DIP Conformal Coating

Feb 11, 2000 | Does anybody have a source for jigs/tanks for a manual dip operation? We are stuck conformally coating PCBs manualy and the volumes do not justify us buying a 100k automated machine. there for we have to manually dip the pcb in a silicon based coating. This is a very slow process and I am looking

Press fit connnector

Feb 9, 2000 | Sal: If it�s not the PCB, what about the connector itself ? Is it from a different production lot with some unregularities ( dimensions, tolerances, pin alignment, material weakness)? How about handling, storage, shipping causes ? Could it be a tooling problem (worn out tools)? Similar things I

Vitronics 722 Oven

Feb 1, 2000 | Gary, You may have luck by posting this info in our PCB Capital Equipment Mart-wanted section. The Mart also contains a large listing of equipment. Please also take note that we have a few used equipment dealers as advertisers whom you may want to check with. Good luck! Roland Girouard

Re: Inprocess Cu plating measurement tools/machine for Flex.

Feb 1, 2000 | Hi Folks, I am looking for some info. and possibly a source on measuring inprocess copper plating thickness for Flex PCB manufacturing facilities. I have tried XRF, E-Current method but the supplier told us that it wont work with Flex material - thickness is also an issue for this matter. I am

White Tin PCB - Hand soldering

Jan 26, 2000 | Re: White Tin PCB - Hand soldering

PCB Design software

Jan 16, 2000 | Re: PCB Design software

Immersion White Tin Process for PCB Finish

Jan 14, 2000 | Re: Immersion White Tin Process for PCB Finish

Via in the middle of a pad

Jan 10, 2000 | HELLO MIKE, THE PROBLEM WITH THE VIA BEING IN THE MIDDLE OF THE PAD CAN BE HANDLED. IF YOU ARE HAVING PROBLEMS WITH SOLDER FLOWING THROUGH AT REFLOW YOU MIGHT WANT TO CHECK YOUR VACUUM AT YOU SCREEN PRINTER. SOMETIMES THE VACUUM THAT HOLDS THE PCB DURING THE PRINTING PULLS THE PASTE INTO THE VIA

Polyester flex PCB Supplier

Jan 7, 2000 | Re: Polyester flex PCB Supplier

depaneling machines

Dec 23, 1999 | What we did was design or panels with routed out edges held on by tabs. This was very effective. All we use is a pair of pneumatic scissors to cut off the tabs. We are using from single-to 13 layer PCB's and we have had no problems with delamination or scrap. It took a few try

Buying stenciling and pick and place equipement.

Dec 20, 1999 | between stencil and PCB) and angle for the PCB - stencils should be framed or streched by pressure operated frame system - squeegees should have a guidance feature over the whole length to maintain also parallelity and same pressure - two squeegee for either direction print are a good feature - squeegee pressure adjustable for the two seperately - loading and printing by hand - PCB-support you have to look for yourself (you could tape a fixture with PCB-material of the same thickness to the plate), that is something in the low price area that is not supported New systems with those features cost about 5K

Stencil Aperture Reduction Guidelines

Dec 15, 1999 | As a general guidline I would agree with a 10% aperature reduction on chip caps , resistors, and fine pitch provided correct land geometries. When soldering to HASL surface finishes. Three things you may want to consider ; the stencil thickness, the surface finish on the PCB and the solids

PCB assemnly cost analysis

Nov 15, 1999 | Re: PCB assemnly cost analysis

Strange S-20

Nov 3, 1999 | Hi Wes, I was very interested in your S20 problem since I am the Customer Support Center Mgr. for Siemens EAE here in the US. This sounds like a solvable problem. Most likely, due to the random nature, it involves how the vision is locating the pcb upon entry into the machine. Please give me a

Ferrite Bead 1206

Oct 31, 1999 | I am currently placing aprox. 95 to 100 1206 size ferrite beads onto a pcb and having difficulty solding these parts. They appear to be soldered when the board comes off the reflow, but you can flic the parts off by hand. We thought they were contaminated from having them put on tape and reel, so

BGA solder failure rate

Oct 29, 1999 | , profiles,handling, PCB, contamination, wave solder problems etc. Find the cause, Good luck Wolfgang

solder mask wrinkles

Oct 19, 1999 | Carol You're asking a helluva lot if you heat a PCB to 300�C and probably more in such an uncontrolled process. I'm surprised it is not irreparably damaged or, at least, discoloured. I don't think any solder mask is designed for this temperature. What's wrong with screw-in or riveted spacers

Automated Labeling for SMT Assembly

Oct 19, 1999 | I'm looking to automate my PCB labeling. I've looked into a couple of machines but haven't seen much to spark my interest. A friend working for Solectron mentioned a pick & place style machine called the Dataplace he had heard of but didn't have any info to follow. Anyone have any insight

Led tester

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