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  1. #21

    Quote Originally Posted by bossdak View Post
    1M resistor itaod sa tubo sa tubig nya ang tumoy i gaid sa imong bukton. pero diri sa ato wa kaayoy static kay taas ang humidity di parihas sa ubang nasod naay mokilat sa imong tudlo inig kupot nimo sa doorknob.
    Nagtan-aw2x ko aning wrist strap kay lahi2x man ilang Ohms. Naa ka idea unsay advisable nga Ohms and paki-explain nlg pd ngano. TIA

  2. #22
    ^1 million ohms. para di ka mo kirig kung kahikap kag live circuit.

  3. #23
    ako diri, taas man kaayo'g Static Electricity nato diri labi na winter kay dry man kaayo... even karon na spring, taas gihapon ang Static labi na mag fleece jacket ta then lakaw2x sa carpet... sige lang ta'g ka igpot basta dili ta mo hikap dayon ug metal surface... kanang mag hinay2x ta, ma unhan ta'g ambak sa static electricity sa atoag lawas... hehehe...

    akoang ginahimo kay hikap ra sa chassis or back shell sa PSU para ma discharge ang nag accumulate na static electricity sa atoang lawas... so far, very effective... since, we are handling the components on PCB boards (specially in humid countries like the Philippines), ESD is not a big deal compared if we will handle the ICs in units form (kaning in units form, must gyud ang naka ground ta kun atoang hikapon)... kanang mo hikap ta'g metal surface (to dissipate Static electricity or ground ourselves) prior sa atoang pag handle ug component on any PCB board, that is enough to dissipate the build up static electricity sa atoang lawas... this action is effective and safe enough...

    therefore, whenever doing the thing that I had just said above, using a wrist strap "Is Not" a must but just only a "Nice to have"...



    Disclosure:

    Currently, I worked in a Fabless Semiconductor Company... previously, worked in a Semiconductor Manufacturing Company... got > 16 yrs of experience in this industry (all in Quality, Failure Analysis and Reliability)... I know what I'm doing... charing... bwehehehe...

  4. #24
    ^ ang ingon sa amo titser sa una mas makampante/secured ka kung atleast naa kay strap while Holding some components.

    pero siyempre dipindi gihapon na nimo

  5. #25
    ^ that's in theory bro... kun naa ka'y extra na GPU dha... try ug manhandle ug months... then test... check if mamatay ba...

    i made a rough evaluation on the ICs in units form... in 1 yr, akoang gi manhandle ug maayo even during winter. grabeh kaayo ang static nko unya, hikap dayon sa leads... you know what, wala gyud ko mamatyi akoang specimen... hehehe...

    pero, tanan products namo, gi test ni sila'g ESD (HBM, MM and CDM) in units form before releasing to production... and naa'y mahagbong gyud...

    ug sa akoang experience aning passion nato, taod2x naman gyud ni... 21 yrs naman... wla man gyud ko mag care anang ESD grounding straps... but, as i've said, before i'll handle any PC components, mo hikap gyud ko'g metal surface... and in those 21 yrs and counting, wla ko namatyan ug component due to ESD... or poor ESD handling controls...
    Last edited by lloyd_joy; 04-03-2014 at 07:02 AM.

  6. #26
    mao bitaw na, make sure nga muhikap hikap sa ka metal, ayaw lang lain ang hikapon kay delikado, ahaha,

    on topic, diba, maka relate man ka sa mga mahagbong sa QA nga ICs so para in ana siguro, dont have proof though. hehehe

  7. #27
    ^ yes, ang usual Customer complaint namo diri kay EOS... Electrical Over Stress... sunog ang die.. makita after decap. pero, related sa Customer Application... aw, akoa dayon i-invalidate... hehehe...

    wala pa ko naka experience ug "proven" ESD failed units gyud through handling (by a person who is not well grounded)... kani na case, mahagbong lang siguro if ang design sa IC, weak kaayo'g ESD... but during the design stage, gi tan-aw man pud ni sa designer man gud na area... apil ni sa ilahang "Design rule" ang pag butang ug mga ESD protective circuit sa ESD sensitive area sa die.
    Last edited by lloyd_joy; 04-03-2014 at 09:44 AM.

  8. #28
    grabe kaayo ang grounding sa semicon. hastang tiles sa sawg kay conductive. ila i test pirmi ang resistance. tanan equipment naay ground hastang trolley naay kadina gabitay. pero ang mga units sa product engineer kay isulod ras kabinet nga kahoy didto sa ilang office. lol.

  9. #29
    ^ hehehehe... sakto gyud ni... pero, sauna ra ni kun sa Fairchild Semi dha sa MEPZ 1 nag work... hehehe... dugay na gi ilisan ug metal ang desk did2...

    bro bossdak, asa sa semicon ka nag work?

  10. #30
    tambay ra ko ron bay. test product engineer ako last.

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