Apparatus and method for removing known good die using hot shear process
AssigneeInternational Business Machines Corporation
InventorsDavid Charles Olson, Robert Phillips, III
Life of this patent
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Abstract
Apparatus and method is provided for separating electrical connections, such as, solder connections, between two surfaces in which electrical connections are relatively weak and thus can be readily separated. The preferred application of the disclosed process and apparatus is its use in separating semiconductor devices from its device carrier after the devices have been through burn-in tests. The unique process and apparatus allows multiple uses of device carrier for testing and/or burning-in devices.
Claims13
An apparatus for separating an active or passive device from a device carrier, said apparatus comprises:
- (a) a separating means for separating fusible electrical connections that electrically connect said device to said device carrier, said separating means has at least two removing means connected by at least one tension means, and wherein at least two of said removing means securely clamp onto a portion of said device,
- (b) a means for holding said device carrier along with said device and said separating means and forming an assembly, such that said separating means provides a pulling motion to said device,
- (c) placing said assembly in a thermal environment and heating said assembly until said electrical connections reach the liquidus state, whereupon said separating means pulls said device away from said device carrier, thereby separating said device from said device carrier.
An apparatus for separating an active or passive device from a device carrier, said apparatus comprises:
- (a) a separating means for separating fusible electrical connections that electrically connect said device to said device carrier, wherein said separating means is secured to said device,
- (b) a means for holding said device carrier along with said device and said separating means and forming an assembly, such that said separating means provides a pulling motion to said device,
- (c) placing said assembly in a thermal environment and heating said assembly until said electrical connections reach the liquidus state, whereupon said separating means pulls said device away from said device carrier, and
- (d) means for securing at least a portion of at least one strip to said separating means, and wherein at least a portion of said strip is in contact with said device, and wherein said at least one strip clamps onto said device when said strip is heated, thereby separating said device from said device carrier, and wherein said separating means is a clamp.
An apparatus for separating an active or passive device from a device carrier, said apparatus comprises:
- (a) a separating means for separating fusible electrical connections that electrically connect said device to said device carrier, wherein said separating means is secured to said device,
- (b) a means for holding said device carrier along with said device and said separating means and forming an assembly, such that said separating means provides a pulling motion to said device,
- (c) placing said assembly in a thermal environment and heating said assembly until said electrical connections reach the liquidus state, whereupon said separating means pulls said device away from said device carrier, and
- (d) means for securing at least a portion of at least one strip to said separating means, and wherein at least a portion of said strip is in contact with said device, and wherein said at least one strip clamps onto said device when said strip is heated, thereby separating said device from said device carrier, and wherein said separating means is a clamp whose weight is substantially greater than the weight of said device.
Dependencies are inferred from the claim text.