Abstract:
A temporary package for a semiconductor die is provided. The temporary package has an outline and external contact configuration that are the same as a conventional plastic or ceramic semiconductor package. The temporary package can be used for burn-in testing of the die using standard equipment. The die can then be removed from the package and certified as a known good die. The package includes a base, an interconnect and a force applying mechanism. The package base includes external contacts formed in a dense array, such as a land grid array (LGA), a pin grid array (PGA), a bumped grid array (BGA) or a perimeter array. The package base can be formed of ceramic or plastic with internal conductive lines using a ceramic lamination process, a 3-D molding process or a Cerdip formation process.
Abstract:
A probe card for testing semiconductor dice contained on a wafer and a method for fabricating the probe card are provided. The probe card includes a substrate preferably formed of silicon, and having a pattern of contact members corresponding to a pattern of test pads on the wafer. Each contact member is formed integrally with the substrate and includes a projection formed as an elongated blade adapted to penetrate into a corresponding test pad to a limited penetration depth. In addition, a cavity and a flexible membrane are formed in the substrate subjacent to the contact members to permit flexure of the contact members. Fluid or gas pressure can be introduced into the cavity through flow passages formed in the substrate.
Abstract:
A chip scale package comprised of a semiconductor die having a silicon blank laminated to its active surface. The bond pads of the die are accessed through apertures micromachined through the blank. The package may be employed with wire bonds, or solder or other conductive bumps may be placed in the blank apertures for flip-chip applications. Further, the package may be employed to reroute external connections of the die to other locations, such as a centralized ball grid array or in an edge-connect arrangement for direct or discrete die connect (DDC) to a carrier. It is preferred that the chip scale package be formed at the wafer level, as one of a multitude of packages so formed with a wafer-level blank, and that the entire wafer be burned-in and tested to identify the known good die (KGD) before the wafer laminate is separated into individual packages.
Abstract:
An apparatus for automatically positioning electronic dice within temporary packages to enable continuity testing between the dice bond pads and the temporary package electrical interconnects is provided. The apparatus includes a robot having a programmable robot arm with a gripper assembly, die and lid feeder stations, a die inverter, and a plurality of cameras. The cameras take several pictures of the die and temporary packages to precisely align the die bond pads with the temporary package electrical interconnects. A predetermined assembly position is located along a conveyor that conveys a carrier between a first position, corresponding to an inlet, and a second position, corresponding to an outlet. The die, a restraining device and temporary package are assembled at the predetermined assembly position and tested for continuity therebetween. The apparatus further includes a fifth camera which locates the die at a wafer handler. The apparatus has a control mechanism including a microprocessor and program routines that selectively control the robot arm (i) to move the gripper assembly to the lid feeder station to pick up a lid, (ii) to move the gripper assembly along with the lid to pick up the die, (iii) to move the gripper assembly along with the lid and the die to a position to be photographed by the fine die camera, and (iv) to move the lid and the die to the predetermined assembly position located along the conveyor. The method and apparatus may also be used for disassembly.
Abstract:
A machine and method for bonding puncture-type conductive contact members of an interconnect to the bond pads of a bare semiconductor die includes the use of one or two ultrasonic vibrators mounted to vibrate one or both of the die and interconnect. A short axial linear burst of ultrasonic energy enables the contact members to pierce hard oxide layers on the surfaces of the bond pads at a much lower compressive force and rapidly achieve full penetration depth.
Abstract:
A semiconductor carrier and system for testing bumped semiconductor components, such as dice and packages, having contact bumps are provided. The carrier includes a base, an interconnect, and a force applying mechanism. The interconnect includes patterns of contact members adapted to electrically contact the contact bumps. The interconnect can include a substrate having contact members formed as recesses, or as projections, covered with conductive layers. Alternately, the interconnect can be a multi layered tape bonded directly to a base of the carrier. In addition to providing electrical connections, the contact members perform an alignment function by self centering the contact bumps within the contact members. The carrier can also include an alignment member configured to align the components with the interconnect. The system can include the carrier, a socket, and a testing apparatus such as a burn-in board in electrical communication with test circuitry.
Abstract:
A method, apparatus and system for establishing temporary electrical communication with semiconductor components having contact bumps are provided. The apparatus includes an interconnect having patterns of contact members adapted to electrically contact the contact bumps. Each contact member includes an array of one or more electrically conductive projections in electrical communication with an associated conductor. The projections form contact members for retaining individual contact bumps on the semiconductor components. The projections can be pillars having angled faces covered with a conductive layer. Alternately the projections can be a material deposited on the substrate, or can be microbumps formed on multi layered tape bonded to the substrate. The interconnect can be employed in a wafer level test system for testing dice contained on a wafer, or in a die level test system for testing bare bumped dice or bumped chip scale packages.
Abstract:
A method, apparatus and system for testing semiconductor wafers are provided. The method includes providing a wafer carrier to provide an electrical path for receiving and transmitting test signals to the wafer. The wafer carrier includes a base for retaining the wafer, and an interconnect having contact members configured to establish electrical communication with contact locations on the wafer. The wafer carrier can include one or more compressible spring members configured to bias the wafer and interconnect together in the assembled carrier. The wafer carrier can be assembled, with the wafer in alignment with the interconnect, using optical alignment techniques, and an assembly tool similar to aligner bonder tools used for flip chip bonding semiconductor dice. A system for use with the carrier can include a testing apparatus configured to apply test signals through the carrier to the wafer while the wafer is subjected to temperature cycling.
Abstract:
A method and carrier for testing semiconductor dice such as bare dice or chip scale packages are provided. The carrier includes a base for retaining a single die, an interconnect for establishing temporary electrical communication with the die, and a force applying mechanism for biasing the die and interconnect together. In an illustrative embodiment the base includes conductors arranged in a universal pattern adapted to electrically connect to different sized interconnects. Interconnects are thus interchangeable on a base for testing different types of dice using the same base. The conductors on the base can be formed on a planar active surface of the base or on a stepped active surface having different sized cavities for mounting different sized interconnects. In an alternate embodiment the carrier includes an interposer. In a first interposer embodiment, the interposer connects directly to external test circuitry and can be changed to accommodate different sized interconnects. In a second interposer embodiment, the interposer connects to conductors on the base and adapts the base for use with different sized interconnects.
Abstract:
A probe card for testing semiconductor dice contained on a wafer and a method for fabricating the probe card are provided. The probe card includes a substrate preferably formed of silicon, and having a pattern of contact members corresponding to a pattern of test pads on the wafer. Each contact member is formed integrally with the substrate and includes a projection formed as an elongated blade adapted to penetrate into a corresponding test pad to a limited penetration depth. In addition, a cavity and a flexible membrane are formed in the substrate subjacent to the contact members to permit flexure of the contact members. Fluid or gas pressure can be introduced into the cavity through flow passages formed in the substrate.