07-01-2021 дата публикации
Номер: US20210005564A1
Принадлежит:
A method includes forming a metal bump on a top surface of a first package component, forming a solder region on a top surface of the metal bump, forming a protection layer extending on a sidewall of the metal bump, reflowing the solder region to bond the first package component to a second package component, and dispensing an underfill between the first package component and the second package component. The underfill is in contact with the protection layer. 1. A package comprising: a dielectric layer;', 'a metal bump protruding beyond the dielectric layer;', 'a solder region over and contacting the metal bump; and', 'a protection layer contacting a sidewall of the metal bump and a surface of the dielectric layer, wherein the protection layer is formed of a dielectric material., 'a first package component comprising2. The package of claim 1 , wherein the protection layer is free from filler particles therein.3. The package of further comprising:a second package component bonded to the first package component; andan underfill contacting the protection layer, wherein the underfill comprises a portion lower than a bottom surface of the metal bump.4. The package of claim 1 , wherein the protection layer is lower than claim 1 , and is spaced apart from claim 1 , the solder region.5. The package of claim 1 , wherein the protection layer and the dielectric layer are formed of a same dielectric material claim 1 , and have a distinguishable interface therebetween.6. The package of claim 1 , wherein the protection layer comprises polyimide claim 1 , polybenzoxazole (PBO) claim 1 , or benzocyclobutene (BCB).7. The package of claim 1 , wherein the first package component comprises an edge claim 1 , and the protection layer is recessed laterally from the edge.8. The package of claim 1 , wherein the first package component further comprises an additional metal bump protruding beyond the dielectric layer claim 1 , and the protection layer comprises:a first portion contacting the ...
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