Patent ID: 11948809
Assignee: DELPHI TECHNOLOGIES IP LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A method for underfilling an electronic circuit assembly, comprising:
mounting one or more dies to a substrate, the substrate including a silicon nitride (Si3N4) material; the one or more dies including a first die;
the substrate is a first substrate and the one or more dies are mounted to the first substrate and a second substrate;
mounting one or more spacers to the substrate, wherein the one or more spacers are soldered directly on the Si3N4 material with a soldering material that does not touch any conductive traces on the substrate, a total volume of the one or more spacers being configured to fill at least 10% of space between the first substrate and the second substrate, the one or more spacers including a first spacer mounted between the first die and an edge, the edge being an edge of the first substrate adjacent to the first die, the first spacer is oriented such that a longer side of the first spacer extends in a direction between the first die and the edge;
dispensing underfill at a location configured to compel a flow of the underfill between the one or more spacers and the one or more dies; and
curing the underfill to secure the one or more dies to the substrate.