Pull testing
OwnerKenneth L. Biggs, C. Fredrick Millerinventors
Life of this patent
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Abstract
An apparatus and method for conducting pull testing of the wires and wire bonds of an electronic apparatus in which a bond wire is engaged by a hook, and the force with which that wire is urged to move away from the hook is measured as the force required to maintain the hook stationary.
Claims9
The method of testing the ability of a wire bond between a wire and a bond point to withstand being pulled, which method comprises the steps of:
- placing a hook under the wire;
- maintaining the position of the hook substantially fixed;
- pulling said bond point away from said position while measuring the magnitude of the pulling force applied to the hook.
The method of conducting pull testing of the wires and wire bonds of a electronic apparatus, which method comprises the steps of:
- fixing said electronic apparatus at a horizontal position below a hook such that the wires and bonds of said apparatus are exposed above said position;
- altering the horizontal position of one of the hook and the apparatus and altering the vertical position and rotational orientation of the hook to place the hook under a wire of said apparatus;
- utilizing said wire to pull the hook by lowering the electronic apparatus;
- and
- maintaining the vertical position of the hook substantially fixed while measuring the magnitude of the force with which the wire pulls on the hook.
The method of conducting pull testing of the wires and wire bonds of a electronic apparatus, which method comprises the steps of:
- fixing said electronic apparatus at a horizontal position below a hook such that the wires and bonds of said apparatus are exposed above said position;
- altering the horizontal position of one of the hook and the apparatus and altering the vertical position and rotational orientation of the hook to place the hook under a wire of said apparatus;
- utilizing said wire to pull the hook by lowering the electronic apparatus;
- and
- measuring the magnitude of the force with which the wire pulls on the hook
- the step of measuring the magnitude with which the wire pulls on the hook is accomplished by fixing said hook to a structure which bears on a force measuring structure whose vertical position remains fixed during the measurement.
A structure for conducting pull testing of wires and wire bonds of an electronic apparatus, which structure comprises:
- a frame;
- a hook;
- means for maintaining the position of said hook constant relative to said frame in a given direction;
- means for urging motion of an electronic apparatus in said given direction away from said hook while a wire of the electronic apparatus is engaged by the hook;
- and
- means for measuring the force with which the hook resists such motion of said electronic apparatus.
A structure for conducting pull testing of wire s and wire bonds of an electronic apparatus, which structure comprises:
- a frame;
- a hook;
- means for maintaining the position of said hook constant relative to said frame in a given direction;
- means for urging motion of an electronic apparatus in said given direction away from said hook while a wire of the electronic apparatus is engaged by the hook;
- means for measuring the force with which the hook resists such motion of said electronic apparatus;
- and
- a movable platform to which an electronic apparatus can be fixed and moved to alter it's position in said direction;
- and
- a hook rotator capable of rotating said hook about an axis which extends substantially in said direction.
Dependencies are inferred from the claim text.