摘要:
A technique is disclosed for causing the top surfaces of solder bumps on a chip to be in the same plane to ensure a more reliable bond between the chip and a substrate. The chip is provided with solder pads that may have different heights. A dielectric layer is formed between the solder pads. A relatively thick metal layer is plated over the solder pads. The metal layer is planarized to cause the top surfaces of the metal layer portions over the solder pads to be in the same plane and above the dielectric layer. A substantially uniformly thin layer of solder is deposited over the planarized metal layer portions so that the top surfaces of the solder bumps are substantially in the same plane. The chip is then positioned over a substrate having corresponding metal pads, and the solder is reflowed or ultrasonically bonded to the substrate pads.
摘要:
An apparatus configured to be coupled onto a substrate, wherein the apparatus comprises a semiconductor substrate and the semiconductor substrate includes a plurality of trenches defined within a side of the semiconductor substrate. The apparatus further comprises an interconnect layer over portions of the side of the semiconductor substrate, wherein the portions of the side of the semiconductor substrate include the plurality of trenches defined within the side of the semiconductor substrate. Each trench is configured to respectively receive a solder ball to provide an interface between i) the interconnect layer and ii) the substrate to which the apparatus is to be coupled.
摘要:
Pillars (300, 306, 502) having a directed compliance geometry are arranged to couple a semiconductor die (400, 500) to a substrate. The direction of maximum compliance of each pillar (300, 306, 502) may be aligned with the direction of maximum stress caused by unequal thermal expansion and contraction of the semiconductor die (400, 500) and the substrate. Pillars (300, 306, 502) may be designed and constructed with various shapes having particular compliance characteristics and particular directions (302, 304, 308, 310, 504) of maximum compliance. The shape and orientation of the pillars (300, 306, 502) may be selected as a function of their location on a die (400, 500) to accommodate the direction and magnitude of stress at their location. Pillars (610) may also be fabricated with particular shapes by patterning a material (604) such as a passivation material on a pad on a die (600) to increase the surface area upon which the pillar (610) is plated or deposited.
摘要:
In an apparatus for connecting integrated circuit devices, a plurality of primary electrically conductive contacts and a plurality of primary electrically conductive pillars are electrically coupled to a primary integrated circuit device. The plurality of primary electrically conductive contacts form a pattern corresponding to secondary electrically conductive contacts disposed on one or more secondary integrated circuit devices. The plurality of primary electrically conductive pillars extends away from the primary integrated circuit device. The plurality of primary electrically conductive pillars forms a pattern that corresponds to substrate electrically conductive contacts that are disposed on a substrate. The plurality of primary electrically conductive pillars and associated connecting material provide a standoff height between the primary integrated circuit device and the substrate that is greater than or equal to a height of the one or more secondary integrated circuit devices.
摘要:
A solder bar compatible with conventional flip chip technology fabrication methods for high power/high current applications includes first and second generally circular solder pads of diameter D formed on a substrate and connected by a solder bar pad of width BW (Fig. 4). The centers of the generally circular solder pads are spaced apart by distance bar length BL. A mass of solder having volume VB and over the solder bar pads to form a dog-bone shaped solder bar (Fig. 5-8). The solder bar reaches height H1 above the centers of the first and second generally circular pads and reaching height H2 above the mid point of the solder bar pad. The values for the diameter D, bar length BL, bar width BW and solder volume VB are selected in a manner that H1 and H2 are approximately equal. Conventional circular (as viewed from above) solder bumps can be formed upon the same substrate; in this case heights H1 and H2 are made approximately equal to the height of the conventional solder bumps.
摘要:
A multilayer structure for a semiconductor device and a method of forming a multilayer structure for a semiconductor device. The multilayer structure comprises: a substrate having an electrically conductive portion thereon; a dielectric layer formed over the substrate; the dielectric layer comprising an opening over at least part of the electrically conductive portion; and a conductive pillar formed on the at least part of the electrically conductive portion; wherein the conductive pillar comprises walls defined by at least the opening of the dielectric layer and an opening of a patterned layer.
摘要:
A structure (10) may include bond elements (24) having bases joined to conductive elements (18) at a first portion of a first surface and end surfaces remote from the substrate (12). A dielectric encapsulation element (40) may overlie and extend from the first portion and fill spaces between the bond elements (24) to separate the bond elements (24) from one another. The encapsulation element (40) has a third surface facing away from the first surface. Unencapsulated portions of the bond elements (24) are defined by at least portions of the end surfaces uncovered by the encapsulation element at the third surface. The encapsulation element (40) at least partially defines a second portion (210) of the first surface that is other than the first portion and has an area sized to accommodate an entire area of a microelectronic element (602). Some conductive elements (18) are at the second portion and configured for connection with such microelectronic element (602).
摘要:
Integrated circuit packages comprise vias, each of which extends from a pad in communication with an integrated circuit on a semiconductor chip through insulating material overlying the semiconductor chip to an attachment surface facing a substrate. The portion of each via proximate the attachment surface is laterally offset from the portion proximate the pad from which it extends in a direction away from the centre of the semiconductor chip. Metallic material received in the vias mechanically and electrically interconnects the semiconductor chip to the substrate.