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Texas Laws and Resolutions Archive
3,144
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1,444
Texas Attorney General Opinions
1,440
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1,304
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1,074
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Effect of Au on the reliability of fine pitch surface mount solder joints
The effect of Au on the reliability of 0.65 mm pitch surface mount solder joints between plastic quad flat packs and Cu-Ni-Au FR-4 printed circuit boards was investigated. Cu-Ni-Au is a desirable printed circuit board finish for multi-chip modules or printed circuit boards that would otherwise require a selective Au finish, for example for edge connectors or wire bondable parts. However, Au is known to embrittle solder when it is present in sufficiently high concentrations, creating a concern that solder joint fatigue life in service will also be adversely affected. This paper reports the results of mechanical shock, mechanical vibration and thermal cycling testing of fine pitch solder joints containing varying amounts of Au. Tests were performed on as-soldered joints and on joints that had been heat-treated to evolve the microstructure toward equilibrium. The tests were designed to accelerate in-service conditions in a typical industrial environment. Under these conditions, the Au concentrations tested did not promote solder joint failures. Microstructural characterization of the distribution and morphology of the Au-, Ni-, and Cu-Sn intermetallics in the joint before and after accelerated testing was also performed. On the basis of these observations it is recommended that the Au concentration in solder joints …
Date:
May 1, 1991
Creator:
Glazer, J. (Hewlett-Packard Co., Palo Alto, CA (United States)); Kramer, P. & Morris, J.W. Jr. (Lawrence Berkeley Lab., CA (United States))
Object Type:
Article
System:
The UNT Digital Library
Revised GCFR safety program plan
This paper presents a summary of the recently revised gas-cooled fast breeder reactor (GCFR) safety program plan. The activities under this plan are organized to support six lines of protection (LOPs) for protection of the public from postulated GCFR accidents. Each LOP provides an independent, sequential, quantifiable risk barrier between the public and the radiological hazards associated with postulated GCFR accidents. To implement a quantitative risk-based approach in identifying the important technology requirements for each LOP, frequency and consequence-limiting goals are allocated to each. To ensure that all necessary tasks are covered to achieve these goals, the program plan is broken into a work breakdown structure (WBS). Finally, the means by which the plan is being implemented are discussed.
Date:
May 1, 1980
Creator:
Kelley, A. P.; Boyack, B. E. & Torri, A.
Object Type:
Article
System:
The UNT Digital Library
Geothermal Reservoir Well Stimulation Program: technology transfer
The following are included: review of available data from previous fracturing stimulation operations, stimulation process variables, fracturing fluid design, hydraulic fracture design, stimulation case histories, and selected bibliography. (MHR)
Date:
May 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
National Health Insurance Proposals and Their Alternatives
This report discusses legislative proposals for a national heath insurance system and alternatives to a national health insurance plan.
Date:
May 5, 1970
Creator:
Cavalier, Kathleen
Object Type:
Report
System:
The UNT Digital Library
Environmental Affairs in the 91st Congress, 1st Session
This report discusses the growth of environmental policy and provides a listing of introduced legislation related to the environment in the 1st Session of the 91st Congress.
Date:
May 16, 1970
Creator:
Congressional Research Service. Environmental Policy Division
Object Type:
Report
System:
The UNT Digital Library
Compensation for Victims of Crimes of Violence
This report details the compensating schemes of victims of comes of violence. It was announced on June 24, 1964, and came into operation on August 1, 1964.
Date:
May 31, 1966
Creator:
Price, Hugh P.
Object Type:
Report
System:
The UNT Digital Library
Digest of Selected Agricultural Legislation: 91st Congress
This report provides a listing of legislation introduced in the 91st Congress related to agriculture.
Date:
May 5, 1970
Creator:
Sherman, Harvey R.
Object Type:
Report
System:
The UNT Digital Library
The Seniority System: Pros, Cons, and Suggested Reforms
This report discusses the seniority system in Congress used to select committee chairman and efforts to reform the system.
Date:
May 27, 1970
Creator:
Oleszek, Walter J.
Object Type:
Report
System:
The UNT Digital Library
Do-It-Yourself Ecology
This report deals with how to develop a good environment.
Date:
May 25, 1970
Creator:
Environmental Action Inc.
Object Type:
Report
System:
The UNT Digital Library
The Nixon Doctrine for Asia
This report provides an overview of the Nixon Doctrine for Asia (written in July 1969) and a discussion of its policies regarding communism in Asia and the Vietnam War.
Date:
May 11, 1970
Creator:
Niksch, Larry A.
Object Type:
Report
System:
The UNT Digital Library
Powers of the President
This report is about the powers of the President.
Date:
May 6, 1969
Creator:
Tansill, William R.
Object Type:
Report
System:
The UNT Digital Library
Developments in Cambodia Following the March 18 Coup
This report discusses the March 18, 1970 coup in Cambodia by General Lon Nol which overthrew the government of Prince Norodom Sihanouk and subsequent fighting in Cambodia between Communist North Vietnamese troops and South Vietnamese troops which led to American intervention in the form of an attack on North Vietnamese bases in Cambodia in April and May of 1970.
Date:
May 11, 1970
Creator:
Niksch, Larry A.
Object Type:
Report
System:
The UNT Digital Library
Powers Of The President
This report consists of the powers of president.
Date:
May 6, 1969
Creator:
Tansill, William R.
Object Type:
Report
System:
The UNT Digital Library
Federal Financial Support for the Construction of Nursing Homes
This report discusses four federal programs which provide funds for the construction of nursing homes and their various provisions for funding.
Date:
May 11, 1970
Creator:
Kline, Janet
Object Type:
Report
System:
The UNT Digital Library
Poll Taxes Levied By States
This report documents how every state deals with the poll tax, and the effect of the poll tax on the voting rights of citizens.
Date:
May 6, 1965
Creator:
Thornton, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Efficiency Rating Systems Preliminary Report
This report is about the Efficiency Rating Systems Preliminary Report
Date:
May 1947
Creator:
Graves, W. Brooke
Object Type:
Report
System:
The UNT Digital Library
Election Laws of the Fifty States and the District of Columbia: A Compilation of Digests of Principal Statutory Provisions with Introductory Summary
This report provides a listing of the major election laws in each state and the District of Columbia organized alphabetically.
Date:
May 1970
Creator:
Yadlosky, Elizabeth; Thornton, Robert L. & Glass, Stuart E.
Object Type:
Report
System:
The UNT Digital Library
Major developments in United states foreign policy during the Kennedy administration, January 20 1961-November 23 1963: A brief selected chronology.
This report is about developments in the United States during the Kennedy administration.
Date:
May 18, 1967
Creator:
Whelan, Joseph G.
Object Type:
Report
System:
The UNT Digital Library
The military-industrial complex. A current reading list. 1969
This report consists of list of the military-industrial complex.
Date:
May 20, 1969
Creator:
Browne, Marjorie Ann
Object Type:
Report
System:
The UNT Digital Library
Erroneous Predictions and Negative Comments Concerning Exploration, Territorial Expansion, Scientific and Technological Development; Selected Statements
This report documents articles that opposed events, buildings, or inventions that are now historically or modernly important, such as the Louisiana Purchase or the invention of the airplane.
Date:
May 29, 1969
Creator:
Gamarra, Nancy T.
Object Type:
Report
System:
The UNT Digital Library
Domestic distribution of USIA materials: A Summary of Pros and Cons
This report is a summary of Pros and Cons of domestic distribution of USIA materials.
Date:
May 8, 1969
Creator:
Collier, Ellen C.
Object Type:
Report
System:
The UNT Digital Library
Environment, Natural Resources and Population
This report includes Findings and recommendations of a study about Environment, Natural Resources and Population conducted by the committee on Resources and Man of the National Academy of Sciences-National Research Council (NAS-NRC).
Date:
May 2, 1969
Creator:
Bowman, Wallace D.
Object Type:
Report
System:
The UNT Digital Library
The National Commitments Resolution of 1969: Background and Issues
This report discusses the National Commitments Act of 1969 which defined what a national commitment was and that they could only be undertaken with legislative consent not just a Presidential order. It was passed by the Senate in 1969. The legislative history of the bill is outlined in this report.
Date:
May 11, 1970
Creator:
Collier, Ellen C.
Object Type:
Report
System:
The UNT Digital Library
Postwar Presidents and the Senate Foreign Relations Committee, 1969.
This report is about the President-Senate foreign relations committee relationship.
Date:
May 6, 1969
Creator:
Collier, Ellen C.
Object Type:
Report
System:
The UNT Digital Library