Professional Hand Soldering Training - SMT, The Art of Drag Soldering and Fine-Pitch QFP

By John Gammel, MIT (Master IPC Trainer. Circuit Technology Inc. Surface Mount Technology

[@LeftyLuc]

If you continue to drag the tip of the soldering iron until it is fully off of the IC instead of pulling it away from the IC you can prevent bridging from occurring at the last couple pins like it did at 1:22, 2:07, 2:25, 3:14, ect. The trick is to keep moving at a uniform and steady speed until you break contact with the final pin.

[@Kellal_Mohamed]

merci pour le conseil

[@SlideyDK]

im pretty sure he knows what he is doing since he is a certified Master IPC Trainer

[@theralhaljordan7337]

that's probably so he doesn't accidently pull the soldering tip into another component next to the IC, pulling out from the last pins is more controlled

[@JustAlanIsCool]

@@black.iczelion That was my initial thought as well. I'll probably make some mistakes along my repair and actually seeing how to handle this could save me a lot of trouble 👍

[@MrPatdeeee]

@@SlideyDK Whether he is a certified Master IPC Trainer or not, He did it wrong. And that is NOT uncommon by Trainers.

[@brittanychristian4846]

This is so satisfying to watch. I was a welder in the Navy years ago and thought soldering would be too small scale/precision work for me. I think I'll be buying a soldering iron now.

[@shake2572]

is it only me who got relax while watching a professional soldering?

[@jacquylenoir9097]

Cela fait plaisir de voir quelqu'un qui sait enfin souder des CMS sans abimer les traces, merci , c'est tellement rare un vrai pro

[@Mavitec2013]

Verdade! Vérité! Truth!

[@paulmoffat9306]

I've hand soldered boards that had SMT parts with pitches as fine as 0.8mm - assembled the first go of prototype boards - all worked properly the first time. One thing that I did, on larger QFPs, was to tack solder the corner pins to keep the part from shifting when soldering the main body. Also works for PLCC components.

[@Pozydrive]

this is such an impressive display of skill with the iron.

[@orionred2489]

Here... now watch this! kzbin.info/www/bejne/bnSro4d8a66MbJI (guy makes a "hot air gun" with a cigarette lighter)

[@pow9606]

@@orionred2489 Ouch. torch those components. lol

[@goognamgoognw6637]

i don't think there's anything impressive. No skills involved, just the right flux, solder and quality iron.

[@James_Knott]

As one who has done similar hundreds of time, I noticed some areas he could improve.

[@ВпсяПупкин]

Круто! Глобализация - это хорошо, все люди, во всем мире, между собой могут делиться своими мыслями и опытом, государственные границы теперь не имеют роли в передаче информации, невероятное 30 лет назад и повседневное сегодня!

[@henrikevertsson8702]

Good eye sight is of essence. I'm 61 and can't do anything without glasses nowadays. Looking glasses usually are too weak for me, so I have found a neat solution. A store nearby sells reading glasses for the equivalent of $2. I'm using three glasses that I have taped together, on top of each other. Two +3 and one +2.5, that is around 9. The advantage is cheapness and that the "looking glass" always is directed to the right spot in front of my face. It's almost like having a microscope on the tip of the nose.

[@luminumlx2604]

CyberPunk 2077

[@jawadanwar6684]

-What if we use 100% of our brain? -Henrik Evertsson: Hold my glasses

[@valeriaalekseeva216]

You have to working with microscope, IMHO.

[@schautamatic]

You should just get a 10x jeweler’s loupe. That’s what MY 61-year-old eyes would want. Sure, a nice 25X optical comparitor would be nice but the cost...the weight...the space you’d need! 😬😄

[@goognamgoognw6637]

@@schautamatic I think you don't know what you're talking about. I own a Bausch and Lomb 10x jeweler loupe, it's fantastic but has very near focal plane distance. You cannot use that to solder unless you want to solder something on the tip of your nose. Lol.

[@ReginatorNet]

No unnecessary talking, just action - Nice!!!

[@harrymason1053]

Nice job, soldering. Good use of flux. Nice the way you keep it both clean and fluxed. Lotta skill there. I hate watching videos when they use poor soldering skills. You're excellent.

[@dsalpha18]

I don't know why but i find this video very relaxing to watch.

[@zaqwertyfish]

Nice. Getting a little refresher on some soldering techniques for a possible new job. I've done a lot of aerospace work... some pretty challenging and fun stuff.

[@dappa211]

you're a pro. You corrected so effortlessly

[@cwbh10]

you skipped the step of soldering a few tabs to hold it in place, that could confuse a beginner for sure!

[@zac5157]

just started soldering and i noticed it right away and thought oh shit good idea, but 2nd to top comment is confused lol

[@deadbluesky]

Well this is pretty easy, what he dosent tell is how to pin the ic in place before he start so it wont move when you solder it for those kind of ic, and what kind of tin and flux you use and also the temperature of you iron !! If this is a solder training well you miss too much thing for the beginner... just saying

[@heatherrhodge2588]

exactly what i was just thinking.. that's why i decided to read comments to see what other ppl thought of this

[@SpaceZeee]

Solder the pads, flux, and hot air the IC

[@peterporkolab2800]

We use two brands of flux: AMtech, or ErSa, they're pretty good. I usually set iron temperature between 360-380 degree Celsius. You have to place the IC manually, after You paste some flux on the surface. This tip is like a spoon, it has a little arc, or curve. Actually, You don't need this special tip, You can do this with a simple soldering tip. Tin: we use the brand "Stannol" diameter=0,8mm, Sn60Pb40. I hope I could help You.

[@deadbluesky]

@@peterporkolab2800 Pin that in the top of the page, for the beginner and peoples who want to learn how to do it well without damaging any parts !! Me i am already a certified tech i just said my opinion.

[@MrPnew1]

@@deadbluesky he cannot pin anything as it's not his video

[@jimmythepowerful]

You telepathic communication skills are incredible...

[@goku445]

lmao

[@phenomkrumper]

I always wondered how they did little ICs like this on boards. Wow, so neat. Amazing how the solder just hits the pins precisely!..

[@boldvoltage639]

Also, the art of vigorously cleaning up no clean flux. Also, the art of filming extreeeeme close up. Very pretty to watch.

[@saadsayyed1536]

Really amazing you did it without using the hot air blower

[@papagregorio6688]

Thanks for the video! You just taught me how to solder my first fram chip! Simple lesson

[@himanshutyagi261]

I use to do this 15 years back for repairing printer logic cards, its very fast and and reliable

[@BitsofSkin]

Very nice!! Looks like its been done in an oven man.. Perfect.

[@insinyurndeso]

IT AMAZES ME. I LOOK FORWARD TO DOING IT TOO. BUT I ONLY HAVE A SIMPLE SOLDER

[@VellahTV]

"I like to watch drag videos." "Cool man, what's your favorite drag car?" "....."

[@Tactical_Taco]

Either are better than the other drag videos

[@gangstermania]

OMG, this is the ASMR that I was looking for

[@Plons0Nard]

I always hold my breath while dragging (yeah, pun intended) But I also held my breath while you were doing it. Anyone who had the same experience ? Wonderfull job 👍

[@gunjankathiriya6327]

Yes, me 2

[@schautamatic]

Nice work! 👍🏼 Back in the 386 Heyday when I worked at Intel, the 25-mil PQFP was being developed. All the pads were printed with solder paste, the PQFP was placed, then IR or vapor phase solder reflow finished the job...sometimes with those annoying solder bridges to deal with. 🤦🏻‍♂️ I noticed that every time you made your solder pass, the last three leads always bridged and needed rework. I wonder if having a fine-thread solder wick at the end of-and and in-line with-your pass would eliminate that bridging tendency. Wouldn’t need any rework that way! 😀

[@pow9606]

very nice technique. May I ask the part number for the Weller tip you are using on the iron. Also what temperature do you have it set too? What solder and flux are you using? One thing is for sure. That's decent solder and not the unleaded clumpy rubbish.

[@bmagic75]

wow. so clean and very professional.

[@windward2818]

My first choice would not be the flat surfaced tip, I would choose a concave tip, either from JBC or PACE (mini-wave), for rework my primary stations are made by PACE and JBC, the concave tips hold more solder volume which ensures you can complete one side of even the largest QFP. I also would use liquid flux to aid in soldering for me in production the PCBs are generally very clean, but the IC packages at times have a noticeable oxidation layer. I have access to production liquid flux of many kinds, RA, RMA, and No Clean which I move to small glass bottles with a small application brush for bench soldering. The liquid brush application work better than the pens because you can apply the volume you need quickly and easily. Pens are handy, but very expensive compared to a small lab grade glass brush application bottle, but obviously you need to have access to production liquid flux which is not always possible. For example, if purchased from Kester, the minimum size is one gallon. In production it is purchased by the barrel and for emergencies a few 5 gallon jugs in case the barrel is contaminated or expired as judged by the production chief engineer. If you use the proper liquid flux and a concave tip, you can easily complete one side of a large QFP with no solder bridges. Also, for rework I generally have the option to use leaded eutectic solders depending on the subassembly. The most difficult liquid flux to get for me seems to be No Clean or Organic, which many times in production requires no end of line hand work to complete the assembly.

[@CAXRAMEDIA]

Clean and beautiful soldering. I'll try ini my next soldering chips . Thanks, Sir.

[@gcommunicationwrahman3658]

Thank you so much dear. May you live long.

[@stevenstaubach1061]

Ah. A fellow professional. I appreciate your video; I'm teaching th/smd and couldn't make it in person today for my students, so thank you for demonstrating drag and dapple (for corrections) so they have a reference. I would offer this for the final pins: when you see wetting on the final pin, stop and drag down the leads and cut away at 30 degrees out while rolling your reservoir tip under to suck up the excess solder. It's just a sec to hit it again, ik; it's just those little things that make it more satisfying though, imo. You feel the same way too, right?

[@furythefurysteriouspetworl6860]

First time I realize that soldering also can be a art work. I'm a mobile technicians, and I do this type of job almost 100 times a day.

[@orionred2489]

This is really nice to see a steady hand and a well maintained toolset. Now watch this! @ (guy makes a "hot air gun" with a cigarette lighter)

[@rainercordeiro4272]

I: "i only need solder this smd now" SMD Component: "Noo, please... No, no, no!"

[@matand009]

Absolutely beautiful solder joints.

[@toaster1971]

I'm a current CIT cert holder, and I'm still learning.

[@pauligrossinoz]

I suspect that this isn't your first time ...😆 Bloody good job! 👍

[@chesayce47]

Great video mate, thanks for taking the time out 👍🥇

[@rameshkumarkaramashibhaiga8787]

નમસ્તે સર, સરસ ઈલેક્ટ્રીશયન તમારા વીડિયો ખૂબ જ ગમે છે

[@farjanasharminswarna2450]

Wow! That was really satisfying to watch.

[@EngineeringTechland]

I am engneer but your my best choice sir...i like you

[@gravemins2]

Woow !! surprising, clean work, very Pro, I like it as a soldier, professional Flux, and the tip of the flat soldering iron

[@GoatZilla]

These SOBs make it look so easy. Just put the part down they said. And then run your soldering iron across the leads they said. It'll be fun and easy they said.

[@agriperma]

The last few pins get bridges, but that is to be expected because you do not want to slide the soldering iron onto the pcb board which would leave an ugly mark. doing it like this, the soldering looks like it was done by machine, very clean.

[@jamesmahoney4525]

Are you using Leaded solder or lead free? Looks like lead 63/37 What type of flux. Soldering Temperature? 0.5, 2 or 2oz copper traces? Was PCB pre heated? Is the face of the soldering iron Concave? Nice demo!

[@wolneycampanha8555]

CONGRATULATIONS !!! Great service !!! 1 HUG OF Brasil... THANKS.

[@paranoidzkitszo]

At the beginning the iron is visibly displayed with the temp over 600...i don't like to assume- though very hot if celcious...so, is that F.? So, approx 350/60 c? Not...675c? But, 675F?

[@wai-sunchia6190]

Holy crap!! This is nerd PRON!! Wonderfully done!! AMAZING!

[@АндрейБ-й6з]

What is this stick, which is used to erase the excess flux? I would like to see her in full. And the gumboil is rosin in alcohol?

[@johncrosley1]

The secret is the use of the no clean flux pen or RF800. This ensures a good joint with no blobbing.

[@naderhumood1199]

Aptly deligintly...... Great job. 🌹✌️

[@totsblanca1528]

From the Philippines - very nice, 2 tumbs up!

[@Visionery1]

That's a damn fine soldering station you have there!

[@mattooi4322]

This is oddly beautiful

[@CanchezAK]

What's board you use in video? Thats special board for soldering training or thats multi-processor device? And if it's special board for training, can you give me link on this, please? I want to learn soldering like you, but i havn't similar boards in my country, thinking, I can buy it in USA, but i dont know, where. Sorry for my bad English, thats not my native language.

[@ivanocj]

wtf! Someone please send a "Random stuff award" to KZbin algorithm...

[@rickvankempen24]

Yeah same here

[@markgigiel2722]

Look for a used hot air bonder station (has other names as well) if you're going to do much of this. You can extract, install and reflow precisely. If the connections are under the chip (balls), other methods won't work. also, many of the newer chips will fail prematurely if you heat them past 650 degrees. I'm a tech with 38 years experience.

[@jonnyerts3997]

Very impressive. I always have trouble with QFP chips.

[@SO_DIGITAL]

What flux are you using and what is the type of tip called? What temperature are you using and is that leaded or lead-free solder? Very neat job!

[@zoiloblanco3694]

Easy all you need is little practice a good flux ,good soldering iron and clean circuit board.

[@bikramadityaguria2340]

What is the name of the paste you used? Because of that paste, the two pins don't stick together, But we are stuck.

[@jonny777bike]

Is there some kind of adhesive used to keep the chip on the board. Why is that not show or was a pick and place machine used.

[@marcelomigueldasilva7444]

Melhor soldador do mundo 👏👏👏

[@TheSalatech]

You make it look so easy :). Perfect job

[@TK_TheFURY]

I've done it myself but I didn't knew soldering could be done this way

[@Mralex22801]

Збс. Могёте, умеете. Пацаны вообще ребята.

[@phenomii2926]

Классно, четко!

[@user-is7cl5fk7v]

я бы тоже так умел с такими материалами и паяльником. но у меня советский 60 ваттный паяльник, какие то прутки припоя сантиметровой толщины и камни канифоли вместо жидкого флюса.

[@user-is7cl5fk7v]

@@elsololobo7506 и это тоже =D

[@hongyangjiang4976]

Great video. I have a question, if there is a chip whose pins only available from the bottom and I extend the size of the pad on the PCB to reduce the difficulty of soldering, is this still consider doable by hands? Or I have to order assembly from the factoty?

[@buckmajor]

What is liquid Pen you using? What liquid are you using to clean the board with cotton pad?

[@Vidya1939]

Nice & clean job

[@ThePunisherisme]

Man.. i want to learn so badly about electronic stuff like this

[@Rottingchristc]

So much info missing. What is 675? Fahrenheit or celcius? What is that liquid used and it's purpose? What type of solder used? What is that cleaning tool?

[@mangushoabel4310]

perfect tecnique used mister

[@menberuburuk3535]

Great and I learn a lot keep it up

[@sansoftinfotech460]

I have white flux , will it work ??? I am trying to apply solder on the fuse clip but it is not sticking , is it due to white flux ??

[@Mavitec2013]

Muito bom! Perfeito! Como se diz aqui no Brasil: Massa! Very good! Perfect! As they say here in Brazil: Massa!

[@marcusfred4480]

Very nice work sir. Although it does help to have good equipment and that nice clean, flat tip.

[@buffplums]

Beautiful job

[@lloydvandever9647]

Great job on the soldering and the video. Now if I just knew what the products and tools you were using I would be able to learn this.

[@MsSplashIt]

after you solder what do you use on your swab to clean things up

[@AjitSingh-mb5rf]

what are u using before soldering. can u tell me what is that. tell me name that product name.

[@nyambemundopu1168]

Kindly highlight different types soldering iron bits. And what would be the best for soldering/desoldering works on cellphone PCBs?

[@SpicyCactus]

This was satisfying to watch

[@m1serfreed477]

It looks like that chip was fitted by a machine, very good. I learned this many years ago but now my sight is not as good although I do have a steady hand most times which is also important.

[@lovelyrose6510]

عطل لوحة ثلاجة بيكو ٢١قدم

[@winstonalf]

You can usb micro scope.

[@NoorquackerInd]

This is such a flex

[@ОлегГруздов-б1я]

Ну мы все прям под большим впечатлением.

[@GlebHripkov]

Если я правильно понял, то вы написали это с сарказмом. Если так, то мне жаль, что смысл обучающих (или в данном случае больше рекламных) роликов Вам не понятен. Также Вам видимо никогда не приходилось иметь дело с микросхемами с шагом выводов 0,5 мм, впрочем как и с пайкой вообще

[@britantyowicaksono8409]

this video is skipped...i want to know how the first time u place the IC. it held really well by soldering the other side first.

[@harys6382]

🙄 man replaced the machine, and machines r now protesting as they gone job less ✌🏼😂 ... fine, and sensitively accurate dude 😍

[@ArifBillahOnGoogle]

It's so satisfying to watch.

[@markvetrov3929]

Well, video doesn't explain anything, so I'll do it instead. The key to solder like that is the tip. It has tiny deepening in center which doesn't allow solder to spread out because of Surface Tension. Such tips are very expensive, but you can make it by yourself from common large tip by drilling a tiny hole in center. Keep in mind that such method decreases lifetime of the tip. Solder and flux doesn't make big difference, but I'd recommend low temperature solder to ain't overheat the component.

[@TheoreticalLimit]

Thanks ! Very useful explanation !

[@AntonioRules]

what does he use to clean? (any link to buy?) thanks.

[@lemonade2473]

so satisfying to watch, i don't even solder

[@mohamadhamzah7728]

Can i know what liquid you use for soldering?

[@ingenierocristian]

What soldering systems do you recommend for soldering training?

[@anshuldehariya7143]

which soldering iron and paste you used

[@aleksandrkrevsky8881]

The VERY BEST !

[@googleuser4203]

How do you make the soldering iron stick there? Mine forms as bubbles...

[@androidoptimusprime]

I think is because of the flux.

[@magnuspihl6974]

Beautiful! It looks you are using some other series of tip than you have in the start where you show the soldeing station. These series of tip has a model where the tip has an imdent for solder. Is the flat type you are using better than this imdent type?

[@heatherrhodge2588]

There was a response in another comment where he said he used a tip with an indent. One of my soldering iron tips broke and ended up having a shape like that.lol it was actually perfect like that but it eventually eroded further and lost its little divit shape. I need to buy one that's already shaped like that bc it really was awesome! I can tell ya the reason this soldering job worked so well is mainly thanks to that tip he used.

[@hervemarie966]

Seems "magic", but you don't talk about products you use to achieve that :-( What is the product you put before solder ? and the "special" you apply to catch the excess material ? Is there a specific flux ? (the soldering iron is about 350 C°). Thanks