wafer.space Community - minimum CoB quantity?

Hi all / @Tim 'mithro' Ansell, I have a question about the CoB packaging option for Run 3. I don't need all 1000 dies packaged. I'd like a smaller batch on CoB for bring-up and testing, with the rest shipped as bare dies. From earlier messages, it sounds like in Run 1 some people received CoBs plus their remaining raw dies, but I couldn't find whether the number packaged can be chosen. 1. Can we pick how many dies go onto CoB? 2. Is pricing per packaged die, and is there a minimum quantity? 3. If I start with a small batch, can more of my bare dies be packaged later? Thanks!

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Seems the ping above didn't work: @Tim 'mithro' Ansell

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daobaanhvn

Hi all / @Tim 'mithro' Ansell, I have a question about the CoB packaging option for Run 3. I don't need all 1000 dies packaged. I'd like a smaller batch on CoB for bring-up and testing, with the rest shipped as bare dies. From earlier messages, it sounds like in Run 1 some people received CoBs plus their remaining raw dies, but I couldn't find whether the number packaged can be chosen. 1. Can we pick how many dies go onto CoB? 2. Is pricing per packaged die, and is there a minimum quantity? 3. If I start with a small batch, can more of my bare dies be packaged later? Thanks!

Hi @daobaanhvn - I'm afraid not. It's only cost effective to do the complete batch at once.

10:14 a.m.

@daobaanhvn - The minimum cost is pretty much ~$1,500 per run -- no matter if we bond 10 die or 1,000 die.

@daobaanhvn - You are welcome to purchase two slots (one with CoB and one without) and put the same design in both.

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Tim 'mithro' Ansell

@daobaanhvn - You are welcome to purchase two slots (one with CoB and one without) and put the same design in both.

Thank you, good to know haha

daobaanhvn

Thank you, good to know haha

We are working with the online chinese PCBA houses to try and enable wire bonding to be a normal part of their PCBA services. Then you could have a small number bonded with totally custom pattern for pretty cheap.

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I also had the same question as number 1, can we request that not all dies are bonded if we choose the CoB option, understanding that the price is still $1500?

glaxus

I also had the same question as number 1, can we request that not all dies are bonded if we choose the CoB option, understanding that the price is still $1500?

I'd expect something like "half fo the dies" or maybe "quarter of the dies" fragmentation between bare-dies and COB-packaging to be realistic at the same price point, especially if you'd not be the only one to ask such.