Zobrazeno 1 - 10
of 39
pro vyhledávání: '"I.C. Ume"'
Autor:
Bryan Rogers, Kathy Derksen, I.C. Ume, Cherif Guirguis, Parimal B. Patel, Aaron Mebane, Vishnu V. B. Reddy, Kola Akinade, Robert Case
Publikováno v:
IEEE Transactions on Components, Packaging and Manufacturing Technology. 9:1219-1226
Unique two-beam laser ultrasonic inspection (LUI) probes were developed for the inspection of the quality of all types of chip packages. Microelectronic assembly houses demand reliable quality inspection tools that can identify all interconnect defec
Publikováno v:
IEEE Transactions on Components, Packaging and Manufacturing Technology. 3:1310-1320
Solder joint voids are usually formed by the entrapped gas bubbles during the reflow process and are common in all surface mount applications. It is a controversial issue on the reliability of the solder joint; however, the consensus is that voiding
Publikováno v:
IEEE Transactions on Advanced Packaging. 33:19-29
Microelectronics packaging technology has evolved from through-hole and bulk configuration to surface-mount and small-profile ones. In surface mount packaging, such as flip chips, chip scale packages, and ball grid arrays, chips/packages are attached
Publikováno v:
IEEE Transactions on Advanced Packaging. 32:729-739
Current techniques for nondestructive quality evaluation of solder bumps in electronic packages are either incapable of detecting solder bump cracks, or unsuitable for in-line inspection due to high cost and low throughput. As an alternative, a solde
Publikováno v:
IEEE Transactions on Advanced Packaging. 31:447-453
Out-of-plane displacement (warpage) has been a major reliability concern for board-level electronic packaging. Printed wiring board (PWB) and component warpage results from coefficient of thermal expansion (CTE) mismatch among the materials that make
Publikováno v:
IEEE Transactions on Advanced Packaging. 31:118-126
Although flip chips have received wide acceptance as an integrated circuit package, significant manufacturing problems exist with the integrity of the connection between the package and the printed circuit board (PCB). Conventional X-ray, ultrasonic
Autor:
I.C. Ume, R.E. Powell
Publikováno v:
IEEE Transactions on Electronics Packaging Manufacturing. 31:83-90
In this paper, a warpage measurement system to simulate forced convective reflow is discussed. A warpage measurement system that can simulate convective reflow enables the real-time monitoring of printed wiring boards (PWBs), PWB assemblies (PWBAs),
Autor:
I.C. Ume, R.E. Powell
Publikováno v:
IEEE Transactions on Components and Packaging Technologies. 30:500-508
The shadow moire and projection moire techniques are widely used methods for measuring printed wiring board (PWB) and PWB assembly (PWBA) warpage. Both methods have high resolution, high accuracy and are suitable for use in an online environment. Whe
Publikováno v:
IEEE Transactions on Components and Packaging Technologies. 29:13-19
The detection of cracks in solder joints has been a challenge for the current nondestructive inspection techniques. This paper investigates the capability of a laser ultrasound and vibrometer inspection system to detect thermal cycle induced cracks i
Autor:
D.S. Erdahl, I.C. Ume
Publikováno v:
IEEE Transactions on Advanced Packaging. 29:178-185
The adoption of surface-mount technology has spurred a rapid decrease in the size of electronic packages. Advanced active component packages, such as flip-chips, chip scale packages (CSPs), and ball grid arrays (BGAs), are attached to a printed wirin