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  3. Does anyone know how to connect two pins of a die to the...

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Does anyone know how to connect two pins of a die to the same net so they are considered a short inside of APD?

JS532
JS532 over 1 year ago

I'm trying to create a specific use case that has a die component with both topside and backside connections. The catch is that these connections need to be considered an electrical short. When I assign them to the same net they need to be connected outside of the die. I'm hoping there's a way to consider these two pins to be an electrical short. I haven't yet figured this out. I did find a PACK_SHORT property possibility inside of a schematic tool but there doesn't seem to be a way utilize this this in APD?

Any help is greatly appreciated.

Joe

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  • masamasa
    0 masamasa over 1 year ago

    what i usually do is to add one more layer (a conductive layer and a dielectric layer as a pair) on top of the existing design. on the added layer with clines and vias, u can connect the two pins

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  • JS532
    0 JS532 over 1 year ago in reply to masamasa

    Hi masamasa, 

    I have done this in the past but it won't work for this situation. I need connections on the top and bottom of the die to be considered a short. The bottom side is attached to an embedded substrate layer and the top side is in a diestack. I thought a d2d via might work but it won't allow this to an embedded layer, only a surface layer. I'm still stuck.

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  • masamasa
    0 masamasa over 1 year ago in reply to JS532

    r u talking about an embedded die like an embedded bridge?

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  • JS532
    0 JS532 over 1 year ago in reply to masamasa

    Yes, this is an embedded die. You could consider it to be similar to an embedded bridge.

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  • JS532
    0 JS532 over 1 year ago in reply to masamasa

    Yes, this is an embedded die. You could consider it to be similar to an embedded bridge.

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  • masamasa
    0 masamasa over 1 year ago in reply to JS532

    what i see on our customers' design with embedded bridge is that they treat the embedded bridges as part of their package (interposer). they do not treat the embedded bridges as components (symbols). if u r talking about embedded dies, that may not be possible as embedded dies can be more complex than embedded bridges.

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  • JS532
    0 JS532 over 1 year ago in reply to masamasa

    Thanks for the suggestion. I will look into whether this would be possible in my scenario. It will likely depend on whether an interposer can have both top and bottom side connections.

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  • JS532
    0 JS532 over 1 year ago in reply to JS532

    Hi masamasa,

    Unfortunately when attempting to use an interposer, it doesn't permit pins (bondpad vias) on the bottom side of the interposer. 

    This type of thing really should be possible. This is frustrating.

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