On 26/02/15 02:26, rickman wrote:> On 2/25/2015 4:46 PM, langwadt@fonz.dk wrote: >> Den onsdag den 25. februar 2015 kl. 21.27.27 UTC+1 skrev rickman: >>> On 2/25/2015 6:01 AM, Tom Gardner wrote: >>>> On 25/02/15 06:25, rickman wrote: >>>>> >>>>> How do you apply the solder? >>>>> >>>>> I have not met anyone who deals with these very tiny BGA or LGA >>>>> packages in a >>>>> home lab. I'd like to meet someone who claims to do that. >>>> >>>> http://www.instructables.com/id/Toaster-Oven-Reflow-Soldering-BGA/ >>>> https://www.youtube.com/watch?v=OkjOwuSEzKU >>>> https://olimex.wordpress.com/2014/05/29/bga-chips-soldering-and-replacement-tutorial/ >>>> >>>> >>>> http://papilio.cc/index.php?n=Papilio.JaxHaxBGASolderingAtHome >>>> >>>> All from 10 seconds with google (bga soldering at home), 60 seconds >>>> copying URLs >>> >>> And yet *none* of these answer the question of how Olaf Kaluza applies >>> the solder to his parts. >>> >>> The first link doesn't apply solder and offers no info on how well that >>> works. >>> >>> The youtube video guy said he made 5 larger BGA boards and only one >>> worked. The BGA in question is rather large. >>> >>> The third link is about removing and replacing a rather large BGA. >>> >>> The video in the fourth link is the same as the youtube video. >>> >>> I appreciate the help, but I'm curious about how Olaf does it with the >>> very tiny parts he is using. >>> >> >> many of the cheap pcb protype shops also make solder paste stencils >> >> paste,stencil, hotplate/toasteroven and you can pretty much solder anything > > In theory. I'd like to hear from someone who had soldered such a fine pitch > part. Someone mentioned the LPC1102/1104 in a 2.2x2.36 mm BGA-16 package. I > believe that would be approx 0.5 mm ball spacing so the pads would be approx > half that or 0.25 mm or 0.010 inches. I would not want to have to align the > stencil to the accuracy required to put solder paste down in 10 mil squares.Search youtube for "reballing bga". There are many videos showing how to remove, reball and resolder large BGAs, e.g. PC motherboard processors, Nvidia GPUs As to whether it is cheaper to get someone else to do it, don't forget to factor in the costs of locating such a company, getting the materials to them etc.
Really tiny microcontrollers
Started by ●February 25, 2013
Reply by ●February 26, 20152015-02-26
Reply by ●February 27, 20152015-02-27
On 2/26/2013 3:37 AM, Paul Rubin wrote:> j.m.granville@gmail.com writes: >> C8051T606-GT IC 8051 MCU 1.5K-EEPROM 10-MSOP >> and coming 'soon', also in 10-MSOP, I see are >> Nuvoton : N76E884 8KF 512R >> SyncMOS : SM39R08A5 1.8~5.5V 25MHZ 8KByteF 256ByteR > > Thanks. The SyncMOS part appears to use the 8051 instruction set which > I guess is fine. I couldn't find anything about the Nuvoton part but > I'll guess it's the same.Odd, I searched on that part number and it shows up in a product guide as being under development, available Q2, 2014. Nuvoton also makes ARMs, but I don't know they come in such small packages. http://www.nuvoton.com/export/sites/nuvoton/enu/Documents/NuvotonPSG.pdf Doesn't seem to be a real part though. Searching on their web site doesn't pull it up. Odd... They do have parts in 20 pin TSSOP packages which are rather small, not 2 mm BGA small though. But with leads they can be hand soldered. -- Rick
Reply by ●March 8, 20152015-03-08
On Saturday, February 28, 2015 at 9:25:46 AM UTC+13, rickman wrote:> On 2/26/2013 3:37 AM, Paul Rubin wrote: > > >> C8051T606-GT IC 8051 MCU 1.5K-EEPROM 10-MSOP > >> and coming 'soon', also in 10-MSOP, I see are > >> Nuvoton : N76E884 8KF 512R > >> SyncMOS : SM39R08A5 1.8~5.5V 25MHZ 8KByteF 256ByteR > > > > Thanks. The SyncMOS part appears to use the 8051 instruction set which > > I guess is fine. I couldn't find anything about the Nuvoton part but > > I'll guess it's the same. > > Odd, I searched on that part number and it shows up in a product guide > as being under development, available Q2, 2014.... > Doesn't seem to be a real part though. Searching on their web site > doesn't pull it up. Odd...If you mean N76E884, I think it is not quite real yet. It appears in this Sept 2014 product brief too : http://www.nuvoton.com/export/sites/nuvoton/files/product-related-information/N76E88X_EN.pdf as part codes N76E884MS10, and N76E884TS16
