Abstract: A system for testing a high speed integrated circuit includes a test device having a test clock with a first maximum frequency for performing level sensitive scan design (LSSD) testing of the integrated circuit device under test, a frequency multiplier circuit for multiplying the test clock signal to a higher second frequency capable of operating the device under test, and a finite state machine for generating a first internal clock for testing the device under test. In a practical embodiment, the internal clock speed may be running at a frequency many multiples of the test clock.

Abstract: A method and system for performing non-standard insitu burn-in testings is disclosed. In accordance with the method and system of the present invention, a transition counter is provided for each of the integrated-circuit (IC) devices under test. A set of scan strings is transmitted to the transition counter in each of the IC devices while the IC devices are operating under a high-temperature /high-voltage environment. A determination is then made as to whether or not a value from the transition counter in each of the IC devices operating under the high-temperature environment is within a predefined range in response to the transmitted scan strings. An indicator associated with each of the IC devices operating under the high-temperature/high-voltage environment is set in response to the transition counter value that occurred outside the predefined range. The IC devices that do not have the indicator set are subsequently tested again with the IC devices operating in room temperature and nominal voltage.

Abstract: A filter cartridge includes a cylindrical inner filter, and a removable and replaceable outer filter of media. The removable and replaceable filter includes more than one layer of media therein. One application for the filter cartridge is in a mist collector arrangement.

Abstract: A filter assembly includes a filter cabinet defining an interior. A filter component is suspended within the filter cabinet interior. The filter component includes an outer frame having first and second rigid frame sections. The first and second rigid frame sections are pivotable, relative to each other about a pivot arrangement, such as a hinge. The first and second frame sections hold filter bags, such that the filter bags are suspended from the frame in the cabinet interior. Methods of changing a filter bag in a cabinet air filter assembly are provided.

Abstract: A mist collector cartridge for collecting airborne liquids, and more particularly, a filter media having vertically oriented interconnected pleats treated with a low surface energy material to facilitate agglomeration and drainage of liquid which accumulates on the inner and outer surface of the filter media.

Abstract: A mist collector cartridge for collecting airborne liquids, and more particularly, a filter media having vertically oriented interconnected pleats treated with a low surface energy material to facilitate agglomeration and drainage of liquid which accumulates on the inner and outer surface of the filter media.

Abstract: A mist collector cartridge for collecting airborne liquids, and more particularly, a filter media having vertically oriented interconnected pleats treated with a low surface energy material to facilitate agglomeration and drainage of liquid which accumulates on the inner and outer surface of the filter media.

Abstract: An engine exhaust filtering system (10) filters carbon particles from exhaust gases. A length of pipe (12) leads from the engine to promote the agglomeration of carbon particles in the exhaust gases. The exhaust gases then pass through a diffuser (36) having a series of chokes (38) to promote further turbulence and agglomeration of the carbon particles. A diffuser (36) directs particles for uniform distribution over a filter cartridge (22). After passing through the filter cartridge (22), the filtered exhaust gases are then expelled into the atmosphere. The filter cartridge (22) is removable and can be reused after the particles are removed.

Abstract: A clean room ceiling grid system having a detent means for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space use above the grid members for either installation or removal of filter panels. The system also includes means for hermetically sealing the interface of connected ceiling grid members and means for substantially laminar flow of filtered air in clean rooms.

Abstract: A clean room ceiling grid system having spring clips for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space use above the grid members for either installation or removal of filter panels. The system also provides for hermetic sealing of the interface of connected ceiling grid members and allows substantially laminar flow of filtered air in clean rooms.

Abstract: An air filtering apparatus is disclosed having a housing defining a chamber with an air inlet and an air outlet. A filter assembly is disposed within the housing and is provided with a first cylindrical filter element and a second cylindrical filter element received within the first element and coaxially aligned. The first filter element and second filter element are supported with opposing surfaces of said elements defining an annular chamber. One axial end of the annular chamber is fixedly sealed and the second end of the axial chamber is provided with a sealing plate connected to a diaphragm for sealing the chamber in response to a suction applied to the second filter element. An impact cleaning mechanism is provided for impacting the second filter element and cleansing it when the annular chamber is exposed.