Method and apparatus for testing tape bond strength
First Claim
1. A device for testing the bond strength between first and second bonded layers of a laminated material which comprise a motor means, chassis means, a guide means mounted on said chassis means, track means mounted on said chassis, drive means powered by said motor means and engaging said track means, said motor means being mounted on said guide means, gauge means for restraining said first bonded layer and for measuring the force applied to said first layer, engaging means mounted on said motor means and driven by said motor means for engaging said second bonded layer, energizing means for selectively applying power to said motor means to activate said drive means to move said drive means and motor means along said track means and said guide means to apply force to said second bonded layer, said engaging means moving laterally away from said gauge means to apply force to the bond between the first and second bonded layers, said gauge means detecting the force applied to said layer and recording means responsive to said gauge means for recording the magnitude of the force measured by said gauge means.
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Accused Products
Abstract
The method and apparatus employs a frequency sensitive electric motor and control system to measure the adhesive bond between a carrier tape and a cover tape adapted to carry miniature components. The adhesive bond strength is dynamically tested and recorded by separating the cover tape from the carrier tape as an energizing signal of predetermined frequency is applied to a frequency sensitive motor for a predetermined period of time while the force required to cause adhesive bond failure is measured and recorded.
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Citations
23 Claims
- 1. A device for testing the bond strength between first and second bonded layers of a laminated material which comprise a motor means, chassis means, a guide means mounted on said chassis means, track means mounted on said chassis, drive means powered by said motor means and engaging said track means, said motor means being mounted on said guide means, gauge means for restraining said first bonded layer and for measuring the force applied to said first layer, engaging means mounted on said motor means and driven by said motor means for engaging said second bonded layer, energizing means for selectively applying power to said motor means to activate said drive means to move said drive means and motor means along said track means and said guide means to apply force to said second bonded layer, said engaging means moving laterally away from said gauge means to apply force to the bond between the first and second bonded layers, said gauge means detecting the force applied to said layer and recording means responsive to said gauge means for recording the magnitude of the force measured by said gauge means.
- 13. A device for testing the bond strength between first and second bonded layers of a laminated material which comprise a movable motor means, chassis means, a guide means mounted on said chassis means, track means mounted on said chassis, drive means powered by said motor means and engaging said track means, said motor means being mounted on said guide mean and movable along said track means, strain gauge means for generating an electrical signal in response to a force applied to said strain gauge means, said strain gauge means adapted to engage a first layer of said laminated material, engaging means operated by said motor means and in cooperation with said drive means for engaging a second layer of said laminated material, energizing means for selectively applying power to said motor means for a predetermined period of time to drive said motor means at a predetermined rate of speed to move said engaging means and second layer to apply a force to said laminated material to separate said first and second layers and thereby generate an electrical signal output from said strain gauge means indicative of the adhesive bond between said first and second layers and recording means for recording the magnitude of said signal.
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19. A method of measuring the force necessary to separate first and second bonded layers of a laminated material which comprises the steps of
a. immobilizing said first bonded layer, b. connecting said second layer to a stepper motor, said stepper motor being movable along a track means c. energizing said motor with an electrical signal of predetermined frequency for a predetermined period of time to apply sufficient force to said second layer to separate said second layer from said first layer, d. measuring the force necessary to separate said second layer from said first layer, e. generating a signal indicative of the magnitude of the force measured when said second layer is separated from said first layer, and then f. recording the magnitude of said signal.
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21. A method of measuring the force necessary to separate first and second bonded layers of a laminated material which comprises the steps of
a. connecting said first layer to a force measuring device, b. connecting said second layer to a stepper motor, said stepper motor being movable along a track means c. generating a pulsating energizing signal of predetermined frequency, d. applying said energizing signal to said stepper motor for a predetermined period of time to apply sufficient force to said second layer to separate said second layer from said first layer, e. measuring the magnitude and duration of the force necessary to separate said second layer from said first layer, f. generating a force signal indicative of the magnitude and duration of the force necessary to separate said second layer from said first layer, and then g. recording the magnitude and duration of said signal.
Specification