摘要:
One embodiment of the invention is a semiconductor system (1400) of arrays (1401, 1402, etc.) of packaged devices. Each array includes a sheet-like substrate (1411, 1412, etc.) made of insulating material integral with conductive horizontal lines and vertical vias, and terminals on the surfaces. Semiconductor components, which may include more than one active or passive chips, or chips of different sizes, are attached to the substrate; the electrical connections may include flip-chip, wire bond, or combination techniques. Encapsulation compound (1412, 1422, etc.), which adheres to the substrate, embeds the connected components. Metal posts (1431, 1432, etc.) traverse the encapsulation compound vertically, connecting the substrate vias with pads on the encapsulation surface. The pads are covered with solder bodies used to connect to the next-level device array so that a 3-dimensional system of packaged devices is formed.
摘要:
A metal interconnect structure (100) comprising a bond pad (101), which has copper with at least 70 volume percent composed of crystal grains expanding more than 1 μm in their main direction, and 30 or less volume percent composed of crystal grains, which expand less than 1 μm in their main crystal direction. A body (102) of tin alloy is in contact with the bond pad.
摘要:
A multiprocessor system (10) includes a plurality of processing modules, such as MPUs (12), DSPs (14), and coprocessors/DMA channels (16). Power management software (38) in conjunction with profiles (36) for the various processing modules and the tasks to executed are used to build scenarios which meet predetermined power objectives, such as providing maximum operation within package thermal constraints or using minimum energy. Actual activities associated with the tasks are monitored during operation to ensure compatibility with the objectives. The allocation of tasks may be changed dynamically to accommodate changes in environmental conditions and changes in the task list. Temperatures may be computed at various points in the multiprocessor system by monitoring activity information associated with various subsystems. The activity measurements may be used to compute a current power dissipation distribution over the die. If necessary, the tasks in a scenario may be adjusted to reduce power dissipation. Further, activity counters may be selectively enabled for specific tasks in order to obtain more accurate profile information.
摘要:
A custom-molded heat sink corresponds to an individual substrate and includes a heat sink lid having at least one cavity corresponding to at least one die mounted on a substrate. A conductive layer is deposited in the at least one cavity that substantially fills the space between the at least one cavity and the at least one die when the lid is coupled to the substrate.
摘要:
An electronic device includes an integrated circuit chip, an interposer and a printed circuit board. A first ball connector is used to connect the interposer to printed circuit board. The interposer may be connected to the integrated circuit chip by a second ball connector or a wire bond. The first ball connector is disposed on a cantilever structure formed in the interposer. The cantilever is formed by creating a channel in the interposer. The cantilever absorbs stress caused by a difference between the thermal expansion of the integrated circuit chip as compared to the printed circuit board. The cantilever thus reduces stress in the ball connector by allowing the ball connector to move within a plane defined by the interposer.
摘要:
A base for a multi-chip module that provides for built-in testability. Active test components are embedded in a module substrate. These test components primarily consist of boundary scan cells that comply with the IEEE 1149.1 test standard. The scan cells are connected to each other, and are connected to interconnection paths among chips and to individual chips, thereby partitioning the module into testable partitions. These partitions permit testing of chip interconnections, chip functionality, and module functionality. Scan cell connections may be mask programmable so that the same multi-chip module base can be used for many different multi-chip module configurations.
摘要:
A plastic package (100) in which a semiconductor chip (101) is adhesively (102) attached to a metal stripe (110a) having an agglomerate structure, and electrically connected to bondable and solderable metal stripes (120) having particulate structures; metal stripes (120) are touching metal stripes (110b) of agglomerate structure to form vertical stacks (150); coats of solder (140) are welded to the agglomerate metal stripes (100a and 110b).
摘要:
A wafer-scale assembly apparatus for integrated circuits and a method for forming the wafer-scale assembly are disclosed. A semiconductor wafer including a plurality of circuits is provided with a plurality of metal contact pads as electrical entry and exit ports. A first wafer-scale patterned polymer film carrying solder balls for each of the contact pads on the wafer is positioned opposite the wafer, and the wafer and the film are aligned. The film is brought into contact with the wafer. Radiant energy in the near infrared spectrum is applied to the backside of the wafer, heating the wafer uniformly and rapidly without moving the semiconductor wafer. Thermal energy is transferred through the wafer to the surface of the wafer and into the solder balls, which reflow onto the contact pads, while the thermal stretching of the polymer film is mechanically compensated. The uniformity of the height of the liquid solder balls is controlled either by mechanical stoppers or by the precision linear motion of motors. After cooling, the solder balls solidify and the first polymer film is removed. The process is repeated for assembling sequentially a wafer-scale patterned interposer overlying all of the solder balls and the wafer and contacting each solder ball with a soldered joint, and a second wafer-scale patterned film carrying solder balls contacting the interposer. In each process, the wafer is heated uniformly and rapidly and without moving it, the alignment is maintained during heating by mechanically compensating for the thermal stretching of the polymer film, and the uniformity of the height of the liquid solder balls is controlled by mechanical stoppers or position closed-loop linear actuators. The second film is removed after cooling. Other embodiments are also disclosed.
摘要:
A conductive via pattern (110) between the uppermost metal interconnect layer (Mn) and next underlying metal interconnect layer (Mn−1) in the bond pad areas strengthens the interlevel dielectric (ILD3) between metal layers (Mn and Mn−1). The conductive via layer (110) may, for example, comprise parallel rails (114) or a grid of cross-hatch rails (116). By spreading the stress concentration laterally, the conductive via layer (110) inhibits micro-cracking from stress applied to the bond pad (112).
摘要:
A predictive power regulation apparatus and method that minimizes power and ground bounce in a logic device. The apparatus includes a predictor and a voltage or current smoothing device connected to the predictor. The voltage or current smoothing device outputs adjusted voltage or current to power and ground planes of the logic device. In one embodiment, the predictor includes an instruction scanner device and a look-up table connected to the instruction scanner device. The instruction scanner device determines the next instruction to be executed by the logic device. A voltage/current scheduling buffer connected to the look-up table contains voltage and current compensation and the time at which the voltage or current compensation should be requested from the voltage or current smoothing device. An alternative predictive power regulation apparatus is described that reduces power and ground bounce caused by the I/O buffer circuitry switching in the logic device.