double sided pcb

"double sided pcb" search results in the Electronics Forums



12777 result s found for "double sided pcb" in the Electronics Forums

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Fiducials

Feb 8, 2018 | yep, Phil nailed it. Also, don't put them in all 4 corners, or if you do, don't place them symmetrically. And keep them far enough from the edge that rail clamps won't block them. And make sure to put them on BOTH sides of a double sided board. These are all things I've seen and had to deal with.

Prototype SMT Printers

Mar 3, 2015 | We are in need of a small SMT printer able to double sided boards with an emphasis on fast changeover and the ability to have board supports. Our typical lot size is 1-20 pieces of rigid boards with technologies down to 0.5mm pitch and 0201's.

Machine Washable Labels.

Oct 27, 2014 | Hi Rob, We use a Brady THT-1-457-10 for serialisation, goes through double sided reflow and aqueous or ultrasonic wash depending on customer requirements. Rob.

Reflow profiling of double sided assemblies

May 24, 2013 | Google for this: "weight_limit_qfn_smta.pdf" Although it is focused on QFN, formula can be used fo

Tape not pulling back on components causes machine to stop

Mar 20, 2013 | Is the problem with the same component or manufacturer? Just for kicks, load a different component on the same feeder. Run machine in trial mode and place only that component on double sided tape. Gary

Reflow Bottom BGA without pallet

Oct 13, 2011 | BGA solder joint reliability is actually improved slightly from a double-sided reflow. [Jean-Paul Clech APEX 2003 Solder Joint Reliability of BGA Assemblies]

Pin friendly paste

Oct 12, 2011 | Any recommendations for a good PIN FRIENDLY PB-Free ROLO solder paste? My process is OSP double-sided reflow with PTH wave soldering.

Accuracy

Aug 26, 2011 | On any new project we use double sided tape and place all the components to check for placement accuracy and polarity prior to pasting a board. We salvage any large/high dollar parts and toss the passives.

tarnishing gold surfaces

Nov 10, 2010 | subject board fabrication calls for .05 -.125um of gold over 2 - 5 um of nickel. When doing double sided reflow using same profile, parts of the gold are tarnishing and causing test pad failures. any ideas as to the cause?

Double sided BGA assembly

Aug 13, 2009 | Double sided BGA assembly At risk of raising a topic that has already been discussed at length, if that is the case then please point me in the right direction. We have a Lead-Free assembly that has BGA devices on both sides of the board. Any recommendations as to how we might go ahead assembling this board. My concern off

how to measure Adhesive strength

May 11, 2009 | Yes, this is for a double sided board, (bottom) the issue is that the board has a lot af hand ion components before wave soldering, and some components are falling off within this process, even if I hit the 0603s with my finger It falls.

Immersion Silver - Yellowing

Sep 12, 2008 | We have a double sided board with Immersion Silver Plating. After reflow the Silver turns a yellowish color. It still wets good, and the yellow color will polish off with a pencil eraser. Has anyone seen this, or know the cause?

BGA reflow on bottomside

Nov 20, 2007 | Hi all, I have never had to run a product with BGAs on the bottomside of a double sided board. I was just wondering if this is a done thing ? or should I stay well clear. any replies appreciated. aj...

QFN soldering

Nov 10, 2007 | of this is if you are looking for an optimum solder joint; both on the side terminals and the ground pad. We produce double sided pcba:s with a variety of components, such as 0402, 0603, QFP:, TSSOP and BGA. /Mika

Double Sided Tape - Is That The Best?

Aug 15, 2007 | But in the REAL world where the part hits the board, all the software in the world can't predict par

Double Sided Tape - Is That The Best?

Jul 31, 2007 | "Yins" means "yall." It could be "yinz" also. Look here:

Double Sided Tape - Is That The Best?

Jul 31, 2007 | We buy a years worth of the 3M stuff and attatch the cost to a new customer. Guess there could be n

Quoting Software suggestions please!!!

May 9, 2007 | So if you are getting 100% consignment parts on a single sided board, then you are doing it all for free and getting 3-dollars for a doubled board? Wow, that is pretty cheap.

Double-sided boards

Apr 3, 2007 | Look here:

Double-sided boards

Mar 31, 2007 | Look here: htt

IC short

Jan 19, 2007 | What is the part designator? A lot has to do with that. Also, is this a double sided reflow board. Perhaps you need to change your process to accept two heat cycles simultaneously. Solder thieves should work. Check the archives.

BGA chip corner epoxy / adhesive?

Dec 7, 2006 | It may be for a double sided reflow process. Yes, some people do put the BGA on first. I know this first hand.

Fine pitch wave soldering

Sep 25, 2006 | Most companies are double sided paste and reflow, then selective soldering the thru-hole. This will give you the best results and with much more consistency than with Wave Soldering.

invitations

Sep 20, 2006 | no, we can't go to screening as the majority of the products being glued are already stuffed with through-hole that has been bent and clipped. (boards weren't laid out in a fashion that allows for double sided SMT then through hole insertion)

support pins for double sided boards

Sep 7, 2006 | Good morning, I am not a sales representative, unfortunately. Ask Novatec the quote. BR, Pavel

support pins for double sided boards

Sep 6, 2006 | Good afternoon, Check this out:

support pins for double sided boards

Sep 6, 2006 | thanks CL, Any idea how much the Gridlock tooling pin is? Brand new or seconds??? cheers!

support pins for double sided boards

Sep 6, 2006 | support pins for double sided boards we do a similar thing but make the template from paper, we just print out an image from the gerbers (to size) showing both sides in different colours, we set this down on the table (had to work out first where the correct position was) then we place the pins on top of the paper. from this you can

OSP Finish-Lead Free Solder Paste

Jul 19, 2006 | i think the most important thing to consider is the # of reflows. is this a double sided assembly? if so OSP degrades during the first LF reflow. also there are many studies out there that show the wetting on OSP is inferior to some of the other commonly LF finishes.

Batch Ovens

Nov 3, 2005 | JP We are a CM planing doing a high mix of boards ranging from 2"x4" to 8"x10" in a single run of 10 to 50. We don't plan on doing any double side boards. Jay

Immersion gold and BGAs

Aug 31, 2005 | I have expirence running,double sided Imm gold boards recently which ed up a lot of solderability issue. The Imm gold need to be slightly more control during reflow oven area on it's profile.

Double sided BGAs

Jun 23, 2005 | You should be fine with this if it is a plastic body, If it's ceramic or some other kind of heavy pa

wave solder machine

May 17, 2005 | Thx to everyone who replied. we will be running single sided thru hole and double sided smt, 186 rosin flux cause they tell me it can take the heat needed for 18 layer pwbs. some long leads. also they are ordering in pallets to deal with the irregular shped pwbs, so need teeth to carry them

wave solder machine

May 16, 2005 | Fred, give us a quickie at what you will be soldering Single sided thu hole, double sided SMT, both, lead pitches and protrusions, Flux type, and such. Buying a used wave can be tricky and the more info up front the better we will be able to tell you what you need and how to qulify a used wave.

Non-wetting: PTH on double-side reflow

Apr 25, 2005 | Some weeks has passed,Can SMT eng. show us your results of this issue?so that we can learn something

Tooling for double sided SMT

Apr 15, 2005 | For DEK supports heres a link for soft supports.

Tooling for double sided SMT

Apr 14, 2005 | http://www.grid-lok.com/ good stu

Tooling for double sided SMT

Apr 14, 2005 | Tooling for double sided SMT Samsung has bottom side supports available in several configurations, Call dynatech SMT for details 215-675-3566 or http://www.dynatechsmt.com I don't know about the DEK but I am sure that they have supports. no beneficial

SMT Line set-up - bare board??

Apr 12, 2005 | Print it, place it,(Don't reflow it) check it, remove valuable parts & wash it. You could use double sided sticky tape but it leaves crap all over the board when you remove it. Rob.

Non-wetting: PTH on double-side reflow

Apr 6, 2005 | Non-wetting: PTH on double-side reflow I've tried a different lot of the same double header connector (yes its double level right angled header conector) twice but nothing has improved. I've also suspected that top row of the connector has greater heat sinking capacity (which should hold true) but the problem occurs on the bottom row the same profile for a board of almost the same size but with more thru hole parts on the top side(single header conn, DIP type IC's, radial capacitors), and there is no problem with the solder joints. One of my night-shift guy just opened the top cover of the oven and the problem is gone. Of course nobody

Double Sided Reflow

Mar 22, 2005 | Hi, Yes it costs more, but would get full speed production. We design our own products, so can fi

Double Sided Reflow

Mar 21, 2005 | it's definitively not possible.. printer/chip shooter/pick and place/reflow and printer/chip shoot

Double Sided Reflow

Mar 17, 2005 | Double Sided Reflow Hi John, This problem is interesting. I've never had a problem with solder shorts caused by subjecting a device to reflow a second time. I've built many double sided SMT assemblies with fine pitch devices on top and bottom. Some things to possibly look at... Is the same pitch located on the primary side? If so, are they shorting? If not, check your bottom side blower settings. I've had problems with off shifts turning up the convection too high thinking they are doing us a favor. This has caused shorts for me in the past. Another possible cause is a "jerky" conveyor. Verify that your

Double Sided Reflow

Mar 17, 2005 | Or... If you have an inline glue dispensor, after printing put a glue dot in the centre of the fo

Double Sided Reflow

Mar 17, 2005 | This happens. You may need to put a dot of chip bonder on the corner of the floating QFP after firs

CP43 Placing problem on PLCC28

Nov 13, 2004 | Place the part on a board with double sided sticky tape. I bet the part is sliding around AFTER mounting. The tape would proove this. Also, are you sure your not dragging on the scrap counter? Maybe the height of the part is just touching the underside of the counter...

SMT tact time

Sep 8, 2004 | Hi Rob, Thanks for the reply. Our boards are 4 ~ 6 ups and mostly double sided. The ratio between chips and IC/Odd shape varied from products to products. So, line balancing between chipmounter and GSM is tough to do. Some boards are mirror image to reduce set.

anyone build circuits for hire?

Jun 23, 2004 | How many boards? What type of components? Surface mount, through hole or both? Single sided or double? Any surface mount or through hole pins? Ect.

flying probe test services

Led testing color sensors