Abstract: An IR camera is used to image an IC to identify hot spots. The objective of the IR camera is removed and laser optics are inserted into the optical axis of the system. A laser is then used to ablate the encapsulation in a defined area around the optical axis. The IR camera operates in a lock-in mode to obtain phase information of the IR signal from the IC. The phase information is used to obtain a depth estimate of the defect. Predetermined etch rates are then used in conjunction with the depth estimate to generate a timed end-point for the laser ablation.

Abstract: An electronic drum having a shell, a drum head mounted to the shell, and at least one distance detector arranged below the drum head and configured to detect and quantify a change in distance between the distance detector and the drum head.

Abstract: An IR camera is used to image an IC to identify hot spots. The objective of the IR camera is removed and laser optics are inserted into the optical axis of the system. A laser is then used to ablate the encapsulation in a defined area around the optical axis. The IR camera operates in a lock-in mode to obtain phase information of the IR signal from the IC. The phase information is used to obtain a depth estimate of the defect. Predetermined etch rates are then used in conjunction with the depth estimate to generate a timed end-point for the laser ablation.

Abstract: An electronic drum having a shell, a drum head mounted to the shell, and at least one distance detector arranged below the drum head and configured to detect and quantify a change in distance between the distance detector and the drum head.

Abstract: An improvement in the process of alkaline catalyst removal from crude polyoxyalkylene ether polyols is achieved by treating a mixture of crude polyol, adsorbent, and water with magnesium carbonate and carbon dioxide just prior to filtration.

Abstract: An improvement in the process of alkaline catalyst removal from crude polyoxyalkylene ether polyols is achieved by treating a mixture of crude polyol, adsorbent, and water with carbon dioxide just prior to filtration.

Abstract: An improvement in the process of catalyst removal in the preparation of polyether polyols is achieved by adding a critical amount of water from about 1 to about 5 percent by weight based on the weight of polyol to an adsorbent synthetic magnesium silicate-polyol mixture followed by filtration to remove the adsorbent.