Richard Brown's RF/Microwave Hybrids: Basics, Materials and Processes PDF

By Richard Brown

ISBN-10: 0306481537

ISBN-13: 9780306481536

ISBN-10: 1402072333

ISBN-13: 9781402072338

In 1991 this writer released a monograph[l] in accordance with his adventure instructing microwave hybrid fabrics and processing know-how on the annual ISHM (now the overseas Microelectronics and Packaging Society, IMAPS) symposia. when you consider that that point, the path has been awarded at that venue and on-site at a few commercial and govt companies. The direction has been constantly revised to mirror the various evolutionary alterations in fabrics and procedures. Microwave know-how has existed for nearly a hundred seventy five years. It used to be simply after the discovery of the klystron, previous to international struggle II, that microwave layout and manufacture moved from a couple of visionaries to the expansion the sees this day. during the last decade by myself there were exploding purposes for all sorts of excessive frequency electronics within the miltary, car, instant, machine, telecommunications and clinical industries. those have positioned calls for, unbelievable a decade in the past, on designs, fabrics, techniques and kit to fulfill the ever increasing requisites for more and more trustworthy, smaller, quicker and lower price circuits.

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Additional info for RF/Microwave Hybrids: Basics, Materials and Processes

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Vol 10 (1983) pp l57-62 H. Sobol, Proc. IEEE, Vol. 59, No. 8, pp. 1200-11, August 1971. S. P. Morgan, "Effect of Surface Roughness on Eddy Current Losses at Microwave Frequencies" J. Appl. , Vol. 20, No. 4 (April 1949) pp. 352-362 K. B. Bhasin et. , "Interfacial Roughness in High Frequency Microelectronic Interconnections and Packaging" J. Vac. Sci. and Technol. A3(3) May/June (1985) pp778-9 E. O. Hammerstad et. , ELAB Report, STF 44A 74169, University of Trondheim, Norway (1975) pp. 98-110 R.

3 Return loss. When a signal traverses a conductor geometric or electrical discontinuities part of the signal is reflected. The reflected signal in principle "returns" down its original path and sums to the existing incident wave, where it may distort the wave form and intensity,and is a negative number (-30dB is better than -15dB) However, 36 37 losses are usually expressed as absolute values Return loss has two detrimental parts: a) attenuation, which reduces the magnitude of the incident signal degrading the signal.

Electroplated copper films frequently exhibit columnar grain growth which results in undesirable porosity and surface texture. 9]. 10]. Most thin film conductors on the other hand are deposited onto smooth surfaces, requiring a chemical bond. Low resistivity materials, with the exception of aluminum, do not readily react with the substrate, necessitating a thin glue layer, an additional source of conductor loss. Table 4-3 characterizes the prevalent thin film conductors for conductivity and substrate adhesion.

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RF/Microwave Hybrids: Basics, Materials and Processes by Richard Brown

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