Bond bare die directly on PCB

[tony_taoyh]

bare die

Hi,

Does anybody have the experience to bond the bare die on PCB directly?

I bonded a die (delta sigma ADC) on PCB directly, without putting "conductive adhesive" between the die's backside contact and the PCB's ground.

Currently, the noise level is too high (about 20dB DR lost).

Should I try to get some conductive adhesive to attach the die?

You comments will be appreciated before taking actions.

Thanks a lot.

 

[FvM]

bare die on pcb

It depends on the manufacturer specification. Or you should assemble the chip similar to the packaged version. If it has an exposed pad or substrate connection in lead frame, you should connect it similar.

 

[llbaobao]

die backside connect substrate ground

To bond the die directly on the PCB is not good indeed!
The reliability and the temperature characteristics are not good.
As to noise characteristics, I do not have much experience.

 

[tony_taoyh]

die on pcb

Thanks a lot.