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Show 20B The Salt Lake Tribune Sunday, February 19, 1964 University of Utah Chemists Think Up Better Silicon Wafer Chemists at the University of Utah and scientists at International Business Machines Research Laboratory in San Jose, Calif., have announced a breakthrough in computer chip capacity. They used the results of theoretical studies to produce a new material, which may allow the production of computer chips of considerably higher information density using existing printing tools. "Although people know how to produce random access memory RAM chips that store vast densities of information, methods continue to be sought to increase these densities without significantly increasing production costs, said Josef Michl, chairman of the department of chemistry at the University of Utah memory chips store approximately 64.000 (64K) bits of information. A technological race is under way for the economical production of 356K and 512K capacity chips, or about a quarter of a million to half a million bits of information, Dr. Miclil said RAM chips are made from single crystals of silicon, a plentiful element that is the backbone of the electronics industry. The crystals are sliced into wafers, which are coated with a thin polymer layer. light-sensiti- called a photoresist, that is sensitive to light. An image of the integrated circuit, w hich resembles a complicated street map, is projected onto the surface of the photoresist. The wafer is then treated to develop the latent image. "In this manner, an essentially flat surface is converted into one that contains ridges and valleys, Dr Michl said "This network is ultimately converted into a structure contained in the silicon The silicon can be modified in the exposed regions by processes such as doping with an impurity, oxidizing and metahzing The wafers are ultimately cut into chips, tested, packaged and sold More information can be incorporated into each chip if its structural features the ridges and valleys are smaller, he said Since almost all chips are manufactured by optica! projection printing, the wavelength of the exposure light is one feature that determines the smallest structural dimensions that can be print- ed. Most exposures are done with visible radiation, but the use of light in the region (300-34- 0 nanometers) would theoretically allow higher resolution patterns to be produced, he said. The process, however, is not trivial. The major problem is that most commercial photoresists are designed for use in the visible spectral region and their sensitivity decreases at shorter wavelengths, Dr. Michl said "To achieve maximum sensitivity, a photoresist must be State-of-the-a- rt spectrally matched to the desired wavelength of operation. Using quantum mechanical calculations. Dr. Michl and John W. Downing, a postdoctoral research fellow in chemistry at the U. of U., predicted the effect of structural changes on the absorption spectrum of the molecule of a photoresist currently used with visible light. This allowed for the prediction of certain structural types that might be useful as sensitizers for mid-Uphotoresists, Dr. Michl said. light-absorbi- V IBM scientists, putting theory into practice, have designed sensitizers w hich are optimized for use in the mid-Uregion and have developed new synthetic methods to make the target structures. V n, Slayer Given Prison Term Applying theoretical studies to practical industrial problems is exciting, Dr. Michl said. The role of the National Science Foundation has been critical to the theoretical work FEATURES: system lot uperb special etiects 10 function remote 'TOW THRU MONDAY ONLY' murder is a felony, punishable bv a on term of from and a fine of up to $10,(iifl e first-degre- e pris- 14 day. S event programmability Operate on battery or plug-i- n FORT UNION BLVD. & 6801 SO. STATE STORES Compact and light weight OPEN SUNDAY! microwa MEMDREX Y Technics BELT DRIVE TURNTABLE Y Technics Y" Technics Y HCI STEREO RECOVER VIDEO TAPES PORTABLE TV DELUXE SPEAKERS control per channel Slid Control Lighted Channel 20 Watt Variable t8 pitch control and itrob Indicator ONLY B LITTON G3HD Microwave Oven JENN-AIWith systems that brings the flavor of "'outdoor cookery" indoor. F' MINCH COOKTOPS Cookbook Touch Control Meat Probe Variable Timer Litton Quality 8 ONLY Variable Power OF JENN-AI- DROP-I- R RECORDER LITTON OVER THE RANGE MICROWAVE REPLACES OVERHEAD VENT Several other Panasonic VCR's also on sale 14 day progranunahillty. Special fleet remote 429) N FREE STANDING RANGES ALSO ON SALE NOW! VHS VIDEO Panasonic, control Record up to 8 hour Panasonic' latest model f , 3 I 7KP :t m Variable power Meat probe Large capacity Built-i- n vent & light . ; i mil dUGSill PORTABLE pets 'Whirlpool WASHER 2 cycle Family sin Variable water temp. BOTH FOB ONIY Electronic ColorTrak color self-od- & DRYER COLOR TV tuning . system Panasonic CABLE READY REMOTE CONTROL 19" PORTABLE COLOR TV 19" LARGE SCREEN COLOR PORTABLE ColorTrak Self Adjusting Color System FORT UNION BLVD. & 6801 SOUTH STATE STORES Digital Quarts Tuner Wood grain Cabinet OPEN SUNDAY p regardless of religious years of age or older, sexually active, who a Pap test during the encouraged to attend 388 and lin-ic- women affiliation. 20 or who are have not had past year are PRICED FROM ALL MODELS For Cancer Tels All CONVERTIBLE CONVERTIBLE Clinics Scheduled In Early March hai ged R COOKTOP mmmsrncataa The clinics will include a Pap test, pelvic and breast examination, blood pressure check, hedth education information on risk factors, signs and symptoms of cancer and referral for appropriate medical follow-uSpecially trained registered nurses will do the examinations for which a minimal fee based upon annual familv income will fie i2"B&w Hinged dud cover r?arw..... The Cancer Screening and Control Program, sponsored by the Utah Department of Health and affiliated with the Utah Division of the American Cancer Society, has m hcdnled two women's cancer screening t s in early March The first will be held March fi at the East Millcroek 4th and fith Ward, 3103 E. 3600 South The second is scheduled March 8 at the Pioneer LDS Stake Center. 1401 W 700 South Both clinics will begin at 9 a m and appointments arc necessary Saticon - tube 1 power loom Records picture & sound Records indoors or outdoor without auxiliary lighting Many automatic feature 6 to control HURRY . . . QUANTITIES LIMITED Scott Reightley. convicted of second-degre- e murder for the bludgeoning death of his wife last April 2, has been sentenced to serve five years to life at the Utah State Prison y psychological following a evaluation at the Utah State Prison. Second-degre- CAMERA VHS Format 3 head video D. eight-memb- Miller, Grant Willson, Dennis McKean, Nicholas Clecak, Terry Tompkins, Robert Twieg and Donald Hofer. COLOR COLOR Reightley. 28. convicted of the Diane Barton killing of Reightley, admitted to the killing during his trial last month but claimed that he did not intend to murder her when he attacked her outside their West Valley City home. He told the court he was acting out a sexual fantasy which involved a surprise rape of his w ife His attorney. Ronald L Yengieh. asked the jury to convict his client of the lesser offense of manslaughter Mrs Reightley's fully clothed and battered body was found behind a fepoe near the Reightley home shrink, Dr. Michl said. In this regard, radiation of shorter waveand electron lengths, such as beams, is being used and suitable resists are sought. IBM scientists at San Jose involved in the project were Robert D RECORDER FEATURES: Up-fro- The charges stem from what the FBI believes to be the largest heavy equipment theft ring in U.S history, involving about $3 million in property that was stashed in Utah County density using existing lithographic tools. circuit dimensions continue to LATEST 1984 MODELS U.S Magistrate Calvin Gould set bail for Mr. Pettingill at $5,000. and imposed a $50,000 bail for the other two defendants Three additional defendants are still wanted by authorities considerably higher information predictive capabilities without federal support. The new photoresist is a product of an effective collaboration between industry, a university and a federal funding agency. Rapid progress in the electronic industry will require a continued search for new resists as integrated portable video recorder fTnrprn UuUniU AND DELUXE COLOR CAMERA Two Utahns and a California man, accused of operating a heavy equipment theft ring, have been arraigned in federal court. Lm-do- According to Dr. Michl, the new modified photoresists are capable erf producing smaller dimensions at a lower exposure dose. This may allow the production of microchips of of the Utah group. We would not have had the means to develop the bw Ncy Aim cirar . .. m mm same mmm 3 Arraigned On Charges Of Theft Ring Robert Mattos and his brother-in-laDavid Pettingill, both of Utah County, and Ray Bradshaw, Carmel, Calif., were arrested earlier this month m Las Vegas, Nev along with Mr Bradshaw's brother, Floyd. Floyd Bradshaw, however, was not arraigned due to an illness that required his hospitalization in Nevada. A fifth defendant, Inez Harris Gaxiola, Santa Cruz, was arraigned in California. This is an example of theoretical predictions driving a synthetic program," Dr. Michl said. The result is a tremendous saving of time and effort The only other approach to a problem Lke this is to synthesize dozens of compounds until you find an acceptable candidate. 2010 SO. STATE 487-061- 4 Man.-Fri- . Sat. a.m. to 7 p.m. a.m. to 6 p.m. 9 8 CLOSED SUNDAY 1100 E. FORT UNION BLVD. 566-324- 5 a.m. to 9 p.m. Sat. 8 a.m. to 6 p.m. Sun. 1 1 a.m. to S p.m. Mon.-Fr- i. 9 6 SOI SO. STATE Ft 561-013Mon.-Fr- i. Sat. Sun. 9 a.m. to 8 p.m. a.m. to 8 p.m. 1 1 a.m. to S p.m. 10 9 u |