Loose die fixture

A fixture for holding an integrated circuit of the type having a thickness, a front side and an opposing back side, a first corner and an opposing second corner, the fixture further for positioning the integrated circuit for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, the fixture comprising:

• a supporting brace for providing a support that is immobile in at least a first direction, against which to cooperatively brace the integrated circuit,
• a first jaw piece disposed adjacent the supporting brace, the first jaw piece having a vee shape for receiving the first corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit,
• an adjustable brace for providing a movable second position in the first direction relative to the supporting brace, against which to cooperatively brace the integrated circuit with the supporting brace,
• a second jaw piece disposed adjacent the adjustable brace, the second jaw piece having a vee shape for receiving the second corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, and
• retaining means for adjustably retaining the adjustable brace relative to the supporting brace,
• wherein the fixture has a diameter substantially equal to that of a 200 millimeter silicon wafer, and the fixture fits within a staging means of a wafer probing station designed to receive a 200 millimeter silicon wafer.

A fixture for holding an integrated circuit of the type having a thickness, a front side and an opposing back side, a first corner and an opposing second corner, and first, second, third, and fourth orthogonal edges, the fixture further for positioning the integrated circuit for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, the fixture comprising:

• a supporting brace for providing a support that is immobile in at least a first direction, against which to cooperatively brace the integrated circuit,
• a first jaw piece disposed adjacent the supporting brace, the first jaw piece having a vee shaped cross section in a first plane for receiving the first corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, and also having a vee shaped cross section in a second plane perpendicular to the first plane for receiving the first and second orthogonal edges of the integrated circuit,
• first and second guide rails disposed in an immobile position relative to the first direction,
• an adjustable brace disposed between the first and second guide rails and slideably mounted to the first and second guide rails so as to be selectively moveable along the first and second guide rails, the adjustable brace for providing a movable second position in the first direction relative to the supporting brace, against which to cooperatively brace the integrated circuit with the supporting brace,
• a second jaw piece disposed adjacent the adjustable brace, the second jaw piece having a vee shaped cross section in the first plane for receiving the second corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, and also having a vee shaped cross section in the second plane for receiving the third and fourth orthogonal edges of the integrated circuit, and
• retaining means for adjustably retaining the adjustable brace relative to the supporting brace, the retaining means including a spring for applying pressure against the adjustable brace along the first and second guide rails and towards the supporting brace.

A fixture for holding an integrated circuit of the type having a front side and an opposing back side, a first corner and an opposing second corner, and first, second, third, and fourth orthogonal edges, the fixture for positioning the integrated circuit for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, the fixture comprising:

• a generally circular top plate having a diameter of about 200 millimeters, the top plate forming a first central access port for electrically probing and viewing the front side of the integrated circuit,
• a generally circular bottom plate having a diameter of about 200 millimeters, the bottom plate forming a second central access port for electrically probing and viewing the back side of the integrated circuit,
• a supporting brace mounted between the top plate and the bottom plate, the supporting brace for providing a support that is immobile in at least a first direction, against which to cooperatively brace the integrated circuit,
• a first jaw piece disposed adjacent the supporting brace and within the first central access port and the second central access port, the first jaw piece having a vee shape in a first plane for receiving the first corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, and also having a vee shaped cross section in a second plane perpendicular to the first plane for receiving the first and second orthogonal edges of the integrated circuit,
• first and second guide rails immovably mounted between the top plate and the bottom plate, and disposed in an immobile position relative to the first direction,
• an adjustable brace disposed between the first and second guide rails and slideably mounted to the first and second guide rails between the top plate and the bottom plate so as to be selectively moveable in the first direction along the first and second guide rails, the adjustable brace for providing a movable second position relative to the supporting brace, against which to cooperatively brace the integrated circuit with the supporting brace,
• a second jaw piece disposed adjacent the adjustable brace and within the first central access port and the second central access port, the second jaw piece having a vee shape in the first plane for receiving the second corner of the integrated circuit and cooperatively aligning the integrated circuit into a position for simultaneously electrically probing and viewing the front side and the back side of the integrated circuit, and also having a vee shaped cross section in the second plane for receiving the third and fourth orthogonal edges of the integrated circuit, and
• retaining means for adjustably retaining the adjustable brace relative to the supporting brace, the retaining means including a spring having a first end and a second end, the first end of the spring connected to at least one of the first guide rail, the second guide rail, the supporting brace, the top plate, and the bottom plate, and the second end of the spring disposed adjacent the adjustable brace, for applying pressure against the adjustable brace along the first and second guide rails and towards the first jaw piece of the supporting brace.