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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

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Cleaning sticker residue from EPROM chips (which solvent?)

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    Cleaning sticker residue from EPROM chips (which solvent?)

    I just finished taking the stickers off of 22 AMD Am27C010 -120 EPROMs. Didn't get everything, and there is some adhesive residue left.

    What common products will remove the residue?

    #2
    I'd try 91% isopropyl...

    Comment


      #3
      Originally posted by chulofiasco View Post
      I'd try 91% isopropyl...
      Seconded. Use a q tip and be careful to avoid any markings.

      Comment


        #4
        My first try would be paint thinner (mineral spirits), then perchloroethylene. Since windowed EPROMs are cerDIP packages, you can't really hurt them.
        Reach me: vcfblackhole _at_ protonmail dot com.

        Comment


          #5
          Goo Gone works for me (mostly stickers on laptops), made from petroleum distillates and citrus.
          What I collect: 68K/Early PPC Mac, DOS/Win 3.1 era machines, Amiga/ST, C64/128
          Nubus/ISA/VLB/MCA/EISA cards of all types
          Boxed apps and games for the above systems
          Analog video capture cards/software and complete systems

          Comment


            #6
            I use these for everything:

            https://www.amazon.com/B-D-326895-Al.../dp/B0010L6H1Y

            pre packaged alcohol pads. THICK, and absorbent. I get mine at my local pharmacy for slightly less. Honestly 70% alcohol works just fine.
            It is a mistake to think you can solve any major problems just with potatoes.

            Comment


              #7
              Isopropyl alcohol, apply with whatever. The markings on CERDIP should be unaffected. I often just clean the window, that's really the only part where it matters, and the quartz is usually slick enough that any residue comes right off.
              Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

              Comment


                #8
                Originally posted by glitch View Post
                Isopropyl alcohol, apply with whatever. The markings on CERDIP should be unaffected. I often just clean the window, that's really the only part where it matters, and the quartz is usually slick enough that any residue comes right off.
                Hi test alcohol? You mean this bottle of 151 Rum can be used externally?

                Comment


                  #9
                  Originally posted by ardent-blue View Post
                  Hi test alcohol? You mean this bottle of 151 Rum can be used externally?

                  I've been known to buy everclear for use as a degreaser instead of for drinking.

                  Comment


                    #10
                    I just use (carefully) WD-40 and a qtip.
                    Legacy Computers and Parts

                    Sales of, parts for, and repairs to, Vintage and Legacy computers.

                    Comment


                      #11
                      Goo Gone is what I usually use for adhesives/sticker residue. I then follow it up with Iso Prop. to get rid of the citrus residue. Works great. However try it out first to make sure it doesnt remove the marking.

                      If you don't have goo gone, you can use Mayonnaise. Yes the condiment. It gets rid of sticker residue too. Don't laugh until you try it. Just use Iso Prop after to get rid of that residue...

                      Comment


                        #12
                        I keep a small bottle of 50/50 acetone and 70% isopropyl Alcohol on my workbench, great for removing flux after soldering and makes quick work of removing labels from Ceramic Eproms.

                        Not good however for anything with plastic. It also wipes the markings from all of the Remarked/Counterfeit IC's from China

                        - Gary

                        Comment


                          #13
                          Originally posted by Druid6900 View Post
                          I just use (carefully) WD-40 and a qtip.
                          On a cerDIP UVEPROM, exactly what are you trying to avoid damaging? Short of HF, I don't know of much that will affect the encapsulation, though I'd keep acids away from the leads.

                          In the old days, I'd probably use Freon TF.
                          Reach me: vcfblackhole _at_ protonmail dot com.

                          Comment


                            #14
                            Originally posted by Chuck(G) View Post
                            On a cerDIP UVEPROM, exactly what are you trying to avoid damaging? Short of HF, I don't know of much that will affect the encapsulation, though I'd keep acids away from the leads.

                            In the old days, I'd probably use Freon TF.
                            Since I've never just sprayed it on, I don't know what effect it would have on the "window". Probably none, but, I do like to be careful.
                            Legacy Computers and Parts

                            Sales of, parts for, and repairs to, Vintage and Legacy computers.

                            Comment


                              #15
                              I just use isopropyl alcohol, it works well enough.

                              Comment

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