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Solder Paste - Where can I get some? — Parallax Forums

Solder Paste - Where can I get some?

PhilldapillPhilldapill Posts: 1,283
edited 2009-10-21 01:06 in General Discussion
I'm working on a new design, and I'm going the full SMD route this time around. I've found that using a fine tip soldering tip, and wire solder just doesn't do it. So, I'm now looking for a solder-paste syrienge. I'd like to have really good control of the amount, and placement of the solder paste, so I guess a fine tip would be needed.

Does anyone know where to get one? I've looked on ebay, but all the items are either solder paste in a small "can", or jewelry stuff...

Comments

  • T ChapT Chap Posts: 4,223
    edited 2009-10-18 19:20
    Try zeph.com
    manncorp.com
    digikey.com
  • James LongJames Long Posts: 1,181
    edited 2009-10-18 19:30
    Phil,

    When using syringes, I used these:

    www.zeph.com/zephpaste.htm

    Look for syringes on that page.

    I think you will eventually go to stencils, they make the process so much easier.

    Remember, when going to stencils, syringe paste is a little too "thin" for stencils. Jar solder paste is thicker, and works better. We typically have to mix in some flux to get jar paste the right consistency for hand stenciling.

    Hope this helps,

    James L

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    James L
    Partner/Designer

    Lil Brother SMT Assembly Services

    Please note: Due to economic conditions the light at the end of the tunnel will be turned off until further notice. Thanks for your understanding.
  • PhilldapillPhilldapill Posts: 1,283
    edited 2009-10-18 19:41
    Thanks guys. I should have done this to start, but there is a good thread about 4 posts down about this very subject. Oops.
  • mctriviamctrivia Posts: 3,772
    edited 2009-10-18 21:05
    get a stencil. worth the $25 especially if you panelise several designs into 1 8x10 stencil.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    propmod_us and propmod_1x1 are in stock. Only $30. PCB available for $5

    Want to make projects and have Gadget Gangster sell them for you? propmod-us_ps_sd and propmod-1x1 are now available for use in your Gadget Gangster Projects.

    Need to upload large images or movies for use in the forum. you can do so at uploader.propmodule.com for free.
  • mikedivmikediv Posts: 825
    edited 2009-10-20 23:00
    James I am in the same boat as Phil I bought a bunch of 1M Flash static rams but when they came in they are SMT I bought the carrier boards to go with them but I have already runied 4 of them trying to solder so questions
    1: if I use the solder paste in the ad you posted for Phil is that all I have to do or do I still need to heat it after applying I am hoping its like glue and you just glue the part down?
    2: MCtriva can you please elaborate I see you post about these but the only stencils I have seen are like stickers you peel and stick them on a board and you can drill holes and solder to them is this the product you are referring to ???
    Thanks guys I am finding it way harder to use SMT than I thought, even with an adjustable Iron I end up burning the pads of the carrier boards.
  • mctriviamctrivia Posts: 3,772
    edited 2009-10-20 23:28
    http://ohararp.com/Stencils.html

    Stencils are laser etched to match the pads on your board.

    Solder paste needs to be heated up. Use a convection toaster oven. Run at 200f for 4min, 325 for 2min and then 450 for 30 second.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    propmod_us and propmod_1x1 are in stock. Only $30. PCB available for $5

    Want to make projects and have Gadget Gangster sell them for you? propmod-us_ps_sd and propmod-1x1 are now available for use in your Gadget Gangster Projects.

    Need to upload large images or movies for use in the forum. you can do so at uploader.propmodule.com for free.

    Post Edited (mctrivia) : 10/20/2009 11:43:29 PM GMT
  • James LongJames Long Posts: 1,181
    edited 2009-10-21 00:47
    If using lead-free solder, just buy a cruisinart oven, set it to 425, when it beeps (ready at temp) your boards are done.

    I try to never touch a board with a iron unless I must. When using an iron rosin core solder (Multi-core) or a brand like that is your friend. Flux is also your friend, but make sure it is no-clean.

    James L

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    James L
    Partner/Designer

    Lil Brother SMT Assembly Services

    Please note: Due to economic conditions the light at the end of the tunnel will be turned off until further notice. Thanks for your understanding.
  • mikedivmikediv Posts: 825
    edited 2009-10-21 00:57
    Guys thank you but I have to ask to make sure I fully understand is it ok to have the actual chips on the board so I put the part on with solder paste (Flash static ram) then stick in toaster oven until the paste melts it won't ruin the SMT chips??
    Thank you
  • James LongJames Long Posts: 1,181
    edited 2009-10-21 01:06
    mikediv said...
    Guys thank you but I have to ask to make sure I fully understand is it ok to have the actual chips on the board so I put the part on with solder paste (Flash static ram) then stick in toaster oven until the paste melts it won't ruin the SMT chips??
    Thank you

    That question is loaded.

    The chips are designed to take a certain amount of heat. Most chips will take 260 deg C for at least 10 seconds. SAC305 Solder melts at 218-225 Deg C. So if your careful it will work fine.

    If using leaded solder.....no problem. Just set the oven to 400 and when it comes to that temp. The boards will be done.

    All surface mount chips are baked on the board to mount them.

    James L

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    James L
    Partner/Designer

    Lil Brother SMT Assembly Services

    Please note: Due to economic conditions the light at the end of the tunnel will be turned off until further notice. Thanks for your understanding.
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