Patent ID: 9314882
Filing Date: 2016-04-19
CPC Classification: B23K,H01L,H05K

Claim Text:
1. A method of providing an underfill on a substrate having a surface to which an electronic device is mounted by electrically conductive joints and is separated from the substrate by a space, the space having an open portion that is unoccupied by the electrically conductive joints, the method comprising: cooling the underfill; receiving the substrate with the surface in a plasma-treated condition; providing, after cooling the underfill, the underfill on the substrate along an exterior edge of the electronic device; evacuating the space to provide a vacuum condition in the open portion of the space; and after evacuating the space to provide the vacuum condition and while the vacuum condition is being maintained, causing flow of the underfill toward the exterior edge and into the open portion of the space, wherein the plasma-treated condition of the surface reduces trapping of gas under the underfill provided on the substrate.