Packages with interposers and methods for forming the same
First Claim
Patent Images
1. A package structure comprising:
- an interposer free from active devices therein, the interposer comprising;
a silicon substrate;
an interconnect structure on a front side of the silicon substrate;
through-vias in the silicon substrate;
solder regions electrically coupled to the through-vias; and
a first molding material molding a portion of each of the solder regions therein, wherein no portion of the first molding material is at a same level as the silicon substrate, and wherein the first molding material has properties of being applicable in a liquid state and curable into a solid state;
a die over and bonded to the interposer;
a Printed Circuit Board (PCB) underlying and bonded to the interposer through the solder regions; and
a second molding material encircling the die and comprising an epoxy, with an entirety of the first molding material and an entirety of the second molding material being on opposite sides of the silicon substrate, wherein the second molding material comprises edges aligned to corresponding edges of the silicon substrate of the interposer, and the first molding material and the second molding material are on opposite sides of the silicon substrate of the interposer.
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Abstract
A package structure includes an interposer, a die over and bonded to the interposer, and a Printed Circuit Board (PCB) underlying and bonded to the interposer. The interposer is free from transistors therein (add transistor), and includes a semiconductor substrate, an interconnect structure over the semiconductor substrate, through-vias in the silicon substrate, and redistribution lines on a backside of the silicon substrate. The interconnect structure and the redistribution lines are electrically coupled through the through-vias.
41 Citations
20 Claims
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1. A package structure comprising:
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an interposer free from active devices therein, the interposer comprising; a silicon substrate; an interconnect structure on a front side of the silicon substrate; through-vias in the silicon substrate; solder regions electrically coupled to the through-vias; and a first molding material molding a portion of each of the solder regions therein, wherein no portion of the first molding material is at a same level as the silicon substrate, and wherein the first molding material has properties of being applicable in a liquid state and curable into a solid state; a die over and bonded to the interposer; a Printed Circuit Board (PCB) underlying and bonded to the interposer through the solder regions; and a second molding material encircling the die and comprising an epoxy, with an entirety of the first molding material and an entirety of the second molding material being on opposite sides of the silicon substrate, wherein the second molding material comprises edges aligned to corresponding edges of the silicon substrate of the interposer, and the first molding material and the second molding material are on opposite sides of the silicon substrate of the interposer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A package structure comprising:
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an interposer free from transistors therein, wherein the interposer comprises; a silicon substrate; an interconnect structure over the silicon substrate; a first dielectric layer underlying and in contact with the silicon substrate; and through-vias continuously extending from the silicon substrate into the first dielectric layer, wherein an end of one of the through-vias is level with a bottom surface of the first dielectric layer; a device die over and bonded to the interposer; a Printed Circuit Board (PCB) underlying and bonded to the interposer through solder regions, wherein no package substrate is bonded between the interposer and the PCB; a first molding material encircling the device die, wherein the first molding material comprises edges aligned to corresponding edges of the silicon substrate of the interposer; a second molding material encapsulating portions of the solder regions therein, wherein an entirety of the first molding material and an entirety of the second molding material are on opposite sides of the interposer, and the second molding material does not have any portion at a same level as the silicon substrate of the interposer, and the second molding material has properties of being applicable in a liquid state and curable into a solid state; and an underfill in a gap between the PCB and the interposer. - View Dependent Claims (10, 11, 12)
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13. A package structure comprising:
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an interposer free from active devices therein, wherein the interposer comprises; a silicon substrate; an interconnect structure over the silicon substrate; a first dielectric layer underlying, and in contact with, the silicon substrate; through-vias in the silicon substrate, wherein the through-vias continuously extend from the silicon substrate into the first dielectric layer, wherein an end of one of the through-vias is level with a bottom surface of the first dielectric layer; and a second dielectric layer underlying and in contact with the first dielectric layer; a device die over and bonded to the interposer; a first molding material molding the device die therein, wherein the first molding material comprises a bottom surface contacting the interposer, and edges aligned to corresponding edges of the interposer, wherein a top surface of the first molding material is coplanar with a top surface of the device die; a second molding material, wherein an entirety of the first molding material and an entirety of the second molding material are on opposite sides of the interposer, and the second molding material does not have any portion at a same level as the silicon substrate of the interposer; a Printed Circuit Board (PCB); solder regions physically bonding the interposer to the PCB, with portions of the solder regions encapsulated in the second molding material; and an underfill in a gap between the PCB and the interposer, wherein the underfill has a substantially vertical sidewall in contact with a sidewall of the second dielectric layer and a sidewall of the second molding material, and a slanted sidewall opposite to the substantially vertical sidewall. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification