about solder ball

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • menshawy
    Badcaps Veteran
    • Aug 2013
    • 398
    • egypt

    #1

    about solder ball

    hi all
    what is the difference between Leaded and Lead-free Solder Balls
    and which kind can i use for re-balling laptop bga chipset
    thanks
  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3560
    • slovakia

    #2
    Re: about solder ball

    leaded melts about 180c and stand any heating from chip
    lead free melts about 210c and cracking when repetive heated from chip

    manufacturers using only lead-free solder balls. when reballing u replacing it with leaded

    Comment

    • menshawy
      Badcaps Veteran
      • Aug 2013
      • 398
      • egypt

      #3
      Re: about solder ball

      thanks friend
      which is the best Qwin or Profound

      Comment

      • dellxps15
        Badcaps Legend
        • Feb 2014
        • 1585
        • italy

        #4
        Re: about solder ball

        i use profound. leaded melt at 183 and more (depend on how accurate is the thermocouple) while lead free at 217 and more always depend on thermocouple, pcb and so son.. thin pcb need more degrees, while others need less.

        i use 200° profile for lead free and 222-235 for lead free profile. always use flux for remove and resolder the bga. a good flux.

        Comment

        • menshawy
          Badcaps Veteran
          • Aug 2013
          • 398
          • egypt

          #5
          Re: about solder ball

          thanks friend

          Comment

          • bekirsalman
            Senior Member
            • Nov 2016
            • 137
            • turkey

            #6
            Re: about solder ball

            ALPHA® Solder Paste OM 5002 Chipset repair process is very practical and beautiful ( The only product I've used for years )

            ALPHA OM 5002 Leaded Cream Solder 62-36-2

            Alloy: Sn62 (62% Tin, 36% Lead, 2% Silver)

            Metal Ratio: 90%

            Solder Diameter: Type # 3 (20-45)

            Flux Class: ROLO (IPC J-STD-004 Standard)

            Halide Quantity: Does not contain

            Residue Amount: Colorless, Very Low (no cleaning required)

            Electrical Characteristics: Complies with IPC and Bellcore standards

            Rheology: Suitable for Ragle and Closed System (min.0.4 mm range)

            Printing Speed: up to 200 mm / sec

            Working Temperature: 18-30 0C

            Screen Life: 8 hours (without printing)

            Adhesion Force: 1.5 gr / mm (at 50% humidity, 4 hours later)

            Viscosity: M13 Malcom helical viscometer J-STD-005
            Electronicman

            Comment

            • myth77
              Badcaps Veteran
              • Feb 2017
              • 380
              • Croatia

              #7
              Re: about solder ball

              Up the topic...

              I understand that leaded balls are better then lead-free balls made by manufacturer...but questoins...

              1. If i will use bga chips with leaded solder balls......
              When i remove old bga chip and then clean the surface and pads on the motherboard (with iron tip) do i use lead solder to clean it with? What about flux? can i use lead free flux? or with lead flux?

              2. If i will use bga chips with lead-free solder balls...
              When i remove old bga chip and then clean the surface and pads on the motherboard (with iron tip) do i use lead-free solder to clean it with? What about flux? lead-free flux?

              Thank you!

              Comment

              • dellxps15
                Badcaps Legend
                • Feb 2014
                • 1585
                • italy

                #8
                Re: about solder ball

                i always use leaded flux. we use leaded solder to clean pads to lower melting temperature of existing solder on pads.

                generally we solder with lead free solder because solder is stronger and wont crack in long time use, but sometimes the process of reballing a new bga is the moment we kill new chip if bga are not moist free (no backing done)

                Comment

                • myth77
                  Badcaps Veteran
                  • Feb 2017
                  • 380
                  • Croatia

                  #9
                  Re: about solder ball

                  So, you use chips with lead-free solder balls? but you use leaded solder to clean pads?
                  And generaly you use leaded flux?

                  Comment

                  • dellxps15
                    Badcaps Legend
                    • Feb 2014
                    • 1585
                    • italy

                    #10
                    Re: about solder ball

                    99% of time i reball chip with leaded balls then solder it

                    and yes i always use leaded flux for desolder, clean ,solder.

                    i think best is backing chip before do any work with them.

                    ive soldered many bga without backing, but some chip after i solder it it just dont work.... or bad supplier or i need to backing the bga before do any work. now in winter time i wont do any ga rework and wait for better wheather.

                    Comment

                    Related Topics

                    Collapse

                    • corrize
                      Best way to solder LVDS connector for beginner (and qfn) ?
                      by corrize
                      Hello, I'm a beginner for micro soldering. Right now I have some difficult to solder a qfn 20, I guess I put too much solder on the thermal-ground pad, the result is a corner of chip wich don't touch the board (last try).

                      I use a wire solder with hot air, I tin the board and chip before with iron and I use good flux.

                      I will have to solder a LVDS connector (40 pins, laptop pc), I saw a solder paste in seringe, good quality (it does not scatter).
                      See the test :
                      https://youtu.be/bNAzC-EvqHs?t=1767

                      With hot air from bellow the board, that's...
                      03-09-2023, 02:57 AM
                    • myth77
                      UV solder mask - high temp resistent, recomendation?
                      by myth77
                      Can someone recommend any good UV solder mask? But i need a solder mask that will stand high temperetures. The thing is...sometimes i have a bigger cooper ripped from the board, lets say mosfet pad... i reconstract it with cooper sheet, then i "glue it" with solder mask...then i use UV light...and let it cool a bit. After, i try to clean the cooper of extra solder mask..and till that part all is ok. But, when i use a soldering iron to solder that pad/cooper...the solder mask gets weaker or destroyed and finally the pad is ripped again from the board .
                      Is there any solder mask...
                      03-28-2022, 04:04 AM
                    • petemanuk
                      BGA solder balls not connecting - help pls
                      by petemanuk
                      So I though in my spare time I’d set myself up repairing motherboards mainly pin damaged lga1151 sockets types.

                      I’m using an achi ir sc pro rework station (gave up on my Achie ir6500 - don’t recommend)

                      I’ve managed to get my rework profile somewhere in the correct region (after a lot of trial and error) to get the old sockets off and reflow new ones back on again, the problems I’m getting is not all of the solder balls are re-attaching when re-flow occurs. I know this because when socket is removed pads still look clean and have no solder...
                      11-16-2022, 05:21 AM
                    • abajor
                      A2251 820-0194 CD3217B12 (U3100_W) donors/replacements
                      by abajor
                      I have an A2251 820-01949 which had a failed TPS62180.
                      I was fortunate enough to find the video on "Exploding USB-C" https://youtu.be/CAGnMR1aVuE?si=O1oYvAyNMeAr4dv4 what was shared here on the topic.

                      I was wondering if there are any cross compatible models that have been discovered?
                      We have an apple ID locked A2179 Mac AIR it's CD3217B2 has different lithography and looks slightly gray but I'm assuming it's the same chip in principal, but I am also aware that for some inexplicable reason mac flashes these chips firmware depending on their location on the board....
                      06-27-2024, 01:10 AM
                    • acedogblast
                      Guide to transplant MEC1503 EC chip and EEPROM reprogamming for T14s gen 2 and X13 gen 2
                      by acedogblast
                      This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.

                      There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as...
                      11-02-2024, 05:13 PM
                    • Loading...
                    • No more items.
                    Working...