Abstract:
In some embodiments, to increase the height-to-pitch ratio of a solder connection that connects different structures with one or more solder balls, only a portion (510) of a solder ball's (140) surface is melted when the connection is formed on one structure (110) and/or when the connection is being attached to another structure (HOB). The structure (110) may be an integrated circuit, an interposer, a rigid or flexible wiring substrate, a printed circuit board, some other packaging substrate, or an integrated circuit package. In some embodiments, solder balls (140.1, 140.2) are joined by an intermediate solder ball (140i), upon melting of the latter only. Any of the solder balls (140, 140i) may have a non-solder central core (140C) coated by solder shell (140S). Some of the molten or softened solder may be squeezed out, to form a "squeeze-out" region (520, 520A, 520B, 520.1, 520.2). In some embodiments, a solder connection (210) such as discussed above, on a structure (110A), may be surrounded by a dielectric layer (1210), and may be recessed in a hole (1230) in that layer (1210), to help in aligning a post (1240) of a structure (HOB) with the connection (210) during attachment of the structures (110A, HOB). The dielectric layer (1210) may be formed by moulding. The dielectric layer may comprise a number of layers (1210.1, 1210.2), "shaved" (partially removed) to expose the solder connection (210). Alternatively, the recessed solder connections (210) may be formed using a sublimating or vapourisable material (1250), placed on top of the solder (210) before formation of the dielectric layer (1210) or coating solder balls (140); in the latter case, the solder (140C) sinks within the dielectric material (1210) upon removal of the material (1250) and subsequent reflow. In some embodiments, the solder connections (210) may also be formed in openings (2220) in a dielectric layer (2210) (photoimageable polymer or inorganic) by solder paste printing and/or solder ball jet placement followed by reflow to let the solder sink to the bottom of the openings (2220), with possible repetition of the process and possible use of different solders in the different steps. The solder connections (210, 210.1, 210.2) may be used for bonding one or more structures (HOB, HOC) (e.g. an integrated circuit die or wafer, a packaging substrate or a package) to a structure (110A) (a wiring substrate) on which a die (HOB) is flip-chip connected. The solder connections (210, 210.1, 210.2) may differ from each other, in particular in height, which can be used for attaching a structure (HOB) with posts (1240) of different heights or for attaching two structures (HOB, HOC) in the case of a stepped form of the dielectric layer, one of the structures (HOC) being possibly placed higher than the other structure (HOB). In some embodiments, the structure (HOA) may be removed after bonding to the structures (HOB, HOC) and a redistribution layer (3210) may be formed to provide connecting lines (3220) connecting the solder connections (210) to contact pads (120R) and possibly interconnecting between the solder connections (210) and/or between the contact pads (120R).
Abstract:
The semiconductor device comprises a semiconductor substrate (1) with a main surface (10) and a further main surface (11) opposite the main surface, a TSV (3) penetrating the substrate from the main surface to the further main surface, a metallization (13) of the TSV, an under-bump metallization (5) and a bump contact (6) at least partially covering the TSV at the further main surface. The TSV (3) comprises a cavity (15), which may be filled with a gas or liquid. An opening (15') of the cavity is provided to expose the cavity to the environment.
Abstract:
The semiconductor device comprises a semiconductor substrate (1) with a main surface (10) and a further main surface (11) opposite the main surface, a TSV (3) penetrating the substrate from the main surface to the further main surface, a metallization (13) of the TSV, an under-bump metallization (5) and a bump contact (6) at least partially covering the TSV at the further main surface. The TSV (3) comprises a cavity (15), which may be filled with a gas or liquid. An opening (15') of the cavity is provided to expose the cavity to the environment.
Abstract:
An assembly 100 and method of making same are provided. The assembly 100 can include a first component 105 including a dielectric region 120 having an exposed surface 122, a conductive pad 134 at the surface 122 defined by a conductive element 132 having at least a portion extending in an oscillating or spiral path along the surface 122, and a an electrically conductive bonding material 140 joined to the conductive pad 134 and bridging an exposed portion 137 of the dielectric surface 122 between adjacent segments 136, 138. The conductive pad 134 can permit electrical interconnection of the first component 105 with a second component 107 having a terminal 108 joined to the pad 134 through the electrically conductive bonding material 140. The path of the conductive element 132 may or may not overlap or cross itself.
Abstract:
A semiconductor device including a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer which are sequentially stacked; a first conductivity type upper electrode portion and a first conductivity type lower electrode portion disposed to correspond to each other with the first conductivity type semiconductor layer interposed therebetween; a second conductivity type upper electrode portion and a second conductivity type lower electrode portion disposed to correspond to each other with the first and second conductivity type semiconductor layers interposed therebetween; and a second conductivity type electrode connection portion electrically connecting the second conductivity type upper electrode portion and the second conductivity type lower electrode portion.
Abstract:
An assembly 100 and method of making same are provided. The assembly 100 can include a first component 105 including a dielectric region 120 having an exposed surface 122, a conductive pad 134 at the surface 122 defined by a conductive element 132 having at least a portion extending in an oscillating or spiral path along the surface 122, and a an electrically conductive bonding material 140 joined to the conductive pad 134 and bridging an exposed portion 137 of the dielectric surface 122 between adjacent segments 136, 138. The conductive pad 134 can permit electrical interconnection of the first component 105 with a second component 107 having a terminal 108 joined to the pad 134 through the electrically conductive bonding material 140. The path of the conductive element 132 may or may not overlap or cross itself.