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Jay W. Lathrop
Jay Wallace Lathrop (Bangor, Maine, 6 September 1927 - Asheville, North Carolina, 9 October 2022) was an American engineer and inventor of photolithography. Born in 1927 in Bangor, Maine, Lathrop studied physics in the University of Maine, and Massachusetts Institute of Technology, where he get his BS, MS, and PhD. When he worked as an engineer for the US Army's Diamond Ordnance Fuze Laboratories in the 1950s, he needed to devise a "new proximity fuze to go inside a mortar shell only a couple of inches in diameter". The transistors that existed at that time were too large, and Lathrop tried to miniaturise them. Lathrop, together with Jim Nall, used photoresist from Eastman Kodak to create a mask on a germanium, thus inventing photolithography. They were awarded with $25,000 by the army for their invention in 1958; Lathrop bought "a new station wagon" with this money. Lathrop worked for seven years at the Diamond Ordnance Fuze Lab; he then found a job at Texas Instruments in Dallas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photolithography
Photolithography (also known as optical lithography) is a process used in the manufacturing of integrated circuits. It involves using light to transfer a pattern onto a substrate, typically a silicon wafer. The process begins with a photosensitive material, called a photoresist, being applied to the substrate. A photomask that contains the desired pattern is then placed over the photoresist. Light is shone through the photomask, exposing the photoresist in certain areas. The exposed areas undergo a chemical change, making them either soluble or insoluble in a developer solution. After development, the pattern is transferred onto the substrate through etching, chemical vapor deposition, or ion implantation processes. Ultraviolet, Ultraviolet (UV) light is typically used. Photolithography processes can be classified according to the type of light used, including ultraviolet lithography, deep ultraviolet lithography, extreme ultraviolet lithography, extreme ultraviolet lithography ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germanium
Germanium is a chemical element; it has Symbol (chemistry), symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid or a nonmetal in the carbon group that is chemically similar to silicon. Like silicon, germanium naturally Chemical reaction, reacts and forms complexes with oxygen in nature. Because it seldom appears in high concentration, germanium was found comparatively late in the Timeline of chemical element discoveries, discovery of the elements. Germanium ranks 50th Abundance of elements in Earth's crust, in abundance of the elements in the Earth's crust. In 1869, Dmitri Mendeleev Mendeleev's predicted elements, predicted its existence and some of its Chemical property, properties from its position on his periodic table, and called the element ekasilicon. On February 6, 1886, Clemens Winkler at Freiberg University found the new element, along with silver and sulfur, in the mineral argyrodite. Winkle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medical University Of South Carolina
The Medical University of South Carolina (MUSC) is a public medical school in Charleston, South Carolina. It opened in 1824 as a small private college aimed at training physicians and has since established hospitals and medical facilities across the state. It is one of the oldest continually operating schools of medicine in the United States and the oldest in the Deep South. The school has expanded into a state university with a medical center and six colleges for the education of health professionals, biomedical scientists, and other health care personnel. It also operates as a center for research and has a public hospital. Colleges College of Medicine History The College of Medicine began in 1823 with the incorporation of the Medical College of South Carolina, a private institution of the Medical Society of South Carolina. Seven Charleston physicians formed the initial faculty with 30 students enrolled in 1824. The first graduation was on April 4, 1825. With the excepti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asheville, North Carolina
Asheville ( ) is a city in Buncombe County, North Carolina, United States. Located at the confluence of the French Broad River, French Broad and Swannanoa River, Swannanoa rivers, it is the county seat of Buncombe County. It is the most populous city in Western North Carolina and the state's List of municipalities in North Carolina, 11th-most-populous city with a population of 94,589 at the 2020 United States census, 2020 census. The four-county Asheville metropolitan area has an estimated 422,000 residents. History Origins Before the arrival of the European colonization of the Americas, European Colonists, the land where Asheville now exists lay within the boundaries of the Cherokee Nation, which had homelands in modern Western North Carolina, western North and South Carolina, southeastern Tennessee, and northeastern Georgia (U.S. state), Georgia. A town at the site of the river confluence was recorded as ''Guaxule'' by Spanish explorer Hernando de Soto during his 1540 expedi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clemson University
Clemson University () is a Public university, public Land-grant university, land-grant research university near Clemson, South Carolina, United States. - The blue-shaded pattern denotes university property. This shows Clemson University is ''outside'' of the Clemson city limits. Founded in 1889, Clemson is the second-largest university by enrollment in South Carolina. For the fall 2023 semester, the university enrolled a total of 22,875 undergraduate students and 5,872 graduate students, and the student/faculty ratio was 15:1. Clemson's campus is in the foothills of the Blue Ridge Mountains. The campus now borders Lake Hartwell, which was formed by the Hartwell Dam, dam completed in 1962. Clemson University consists of nine colleges: Agriculture, Forestry and Life Sciences; Architecture, Arts, Art and Construction; Arts and Humanities; Behavioral, Social and Health Sciences; Engineering, Computing and Applied Sciences; Education; The Wilbur O. and Ann Powers College of Busines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jack Kilby
Jack St. Clair Kilby (November 8, 1923 – June 20, 2005) was an American electrical engineer who took part, along with Robert Noyce of Fairchild Semiconductor, in the realization of the first integrated circuit while working at Texas Instruments (TI) in 1958. He was awarded the Nobel Prize in Physics on December 10, 2000. Kilby was also the co-inventor of the handheld calculator and the thermal printer, for which he had the patents. He also had patents for seven other inventions. Early life Jack Kilby was born in 1923 in Jefferson City, Missouri, to Hubert and Vina Freitag Kilby. Both parents had Bachelor of Science degrees from the University of Illinois. His father was a manager at a local utility company. Kilby grew up and attended school in Great Bend, Kansas, graduating from the Great Bend High School. Today road signs at the entrances to the town commemorate his time there, and the Commons Area at Great Bend High School has been named ''The Jack Kilby Commons Are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas Instruments
Texas Instruments Incorporated (TI) is an American multinational semiconductor company headquartered in Dallas, Texas. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces digital light processing (DLP) technology and education technology products including calculators, microcontrollers, and multi-core processors. Texas Instruments emerged in 1951 after a reorganization of Geophysical Service Incorporated, a company founded in 1930 that manufactured equipment for use in the seismic industry, as well as defense electronics. TI produced the world's first commercial silicon transistor in 1954, and the same year designed and manufactured the first transistor radio. Jack Kilby invented the integrated circuit in 1958 while working at TI's Central Research Labs. TI also invented the hand-held calculator in 1967, and intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Scribner's Sons
Charles Scribner's Sons, or simply Scribner's or Scribner, is an American publisher based in New York City that has published several notable American authors, including Henry James, Ernest Hemingway, F. Scott Fitzgerald, Kurt Vonnegut, Marjorie Kinnan Rawlings, Stephen King, Robert A. Heinlein, Thomas Wolfe, George Santayana, John Clellon Holmes, Don DeLillo, and Edith Wharton. The firm published ''Scribner's Magazine'' for many years. More recently, several Scribner titles and authors have garnered Pulitzer Prize, Pulitzer Prizes, National Book Award, National Book Awards and other merits. In 1978, the company merged with Atheneum Books, Atheneum and became The Scribner Book Companies. It merged into Macmillan Inc., Macmillan in 1984. Simon & Schuster bought Macmillan in 1994. By this point, only the trade book and reference book operations still bore the original family name. After the merger, the Macmillan and Atheneum adult lists were merged into Scribner's, and the Scribn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Fight For The World's Most Critical Technology
''The'' is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pronoun ''thee'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastman Kodak
The Eastman Kodak Company, referred to simply as Kodak (), is an American public company that produces various products related to its historic basis in film photography. The company is headquartered in Rochester, New York, and is incorporated in New Jersey. It is best known for photographic film products, which it brought to a mass market for the first time. Kodak began as a partnership between George Eastman and Henry A. Strong to develop a film roll camera. After the release of the Kodak camera, Eastman Kodak was incorporated on May 23, 1892. Under Eastman's direction, the company became one of the world's largest film and camera manufacturers, and also developed a model of welfare capitalism and a close relationship with the city of Rochester. During most of the 20th century, Kodak held a dominant position in photographic film, and produced a number of technological innovations through heavy investment in research and development at Kodak Research Laboratories. Kodak produc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangor, Maine
Bangor ( ) is a city in and the county seat of Penobscot County, Maine, United States. The city proper has a population of 31,753, making it the state's List of municipalities in Maine, third-most populous city, behind Portland, Maine, Portland (68,408) and Lewiston, Maine, Lewiston (37,121). Bangor is known as the "Queen City". Modern Bangor was established in the mid-19th century with the lumber and shipbuilding industries. Due to the city's location on the Penobscot River, logs could be floated downstream from the Maine North Woods and processed at the city's water-powered sawmills, then shipped from Bangor's port to the Atlantic Ocean downstream, and from there to any port in the world. Evidence of this is still visible in the lumber barons' elaborate Greek Revival and Victorian architecture, Victorian mansions and the 31-foot-high (9.4 m) statue of Paul Bunyan. Today, Bangor's economy is based on services and retail, healthcare, and education. Bangor has a port of entry a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoresist
A photoresist (also known simply as a resist) is a light-sensitive material used in several processes, such as photolithography and photoengraving, to form a patterned coating on a surface. This process is crucial in the electronics industry. The process begins by coating a substrate with a light-sensitive organic material. A patterned mask is then applied to the surface to block light, so that only unmasked regions of the material will be exposed to light. A solvent, called a developer, is then applied to the surface. In the case of a positive photoresist, the photo-sensitive material is degraded by light and the developer will dissolve away the regions that were exposed to light, leaving behind a coating where the mask was placed. In the case of a negative photoresist, the photosensitive material is strengthened (either polymerized or cross-linked) by light, and the developer will dissolve away only the regions that were not exposed to light, leaving behind a coating in areas w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
