# Semiconductor Processing Technicians > Perform any or all of the following functions in the manufacture of electronic semiconductors: load semiconductor material into furnace; saw formed ingots into segments; load individual segment into crystal growing chamber and monitor controls; locate crystal axis in ingot using x-ray equipment and saw ingots into wafers; and clean, polish, and load wafers into series of special purpose furnaces, chemical baths, and equipment used to form circuitry and change conductive properties. - Code: 51-9141.00 (O*NET-SOC; SOC 2018 51-9141) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 20 tasks (8 core and 12 supplemental) - Page: https://foundation.org.ai/occupations/51-9141.00 - JSON: https://foundation.org.ai/data/tasks/51-9141.00.json ## What the work is made of 1. Manipulate valves, switches, and buttons, or key commands into control panels to start semiconductor processing cycles. Core task · Task 12573 · Rated by 90 people who do the job, December 2006 2. Maintain processing, production, and inspection information and reports. Core task · Task 12574 · Rated by 88 people who do the job, December 2006 3. Inspect materials, components, or products for surface defects and measure circuitry, using electronic test equipment, precision measuring instruments, microscope, and standard procedures. Core task · Task 12575 · Rated by 90 people who do the job, December 2006 4. Clean semiconductor wafers using cleaning equipment, such as chemical baths, automatic wafer cleaners, or blow-off wands. Core task · Task 12576 · Rated by 91 people who do the job, December 2006 5. Study work orders, instructions, formulas, and processing charts to determine specifications and sequence of operations. Core task · Task 12577 · Rated by 88 people who do the job, December 2006 6. Load and unload equipment chambers and transport finished product to storage or to area for further processing. Core task · Task 12578 · Rated by 91 people who do the job, December 2006 7. Clean and maintain equipment, including replacing etching and rinsing solutions and cleaning bath containers and work area. Core task · Task 12579 · Rated by 89 people who do the job, December 2006 8. Place semiconductor wafers in processing containers or equipment holders, using vacuum wand or tweezers. Core task · Task 12580 · Rated by 91 people who do the job, December 2006 9. Set, adjust, and readjust computerized or mechanical equipment controls to regulate power level, temperature, vacuum, and rotation speed of furnace, according to crystal growing specifications. Supplemental task · Task 12581 · Rated by 91 people who do the job, December 2006 10. Etch, lap, polish, or grind wafers or ingots to form circuitry and change conductive properties, using etching, lapping, polishing, or grinding equipment. Supplemental task · Task 12582 · Rated by 89 people who do the job, December 2006 11. Load semiconductor material into furnace. Supplemental task · Task 12583 · Rated by 91 people who do the job, December 2006 12. Monitor operation and adjust controls of processing machines and equipment to produce compositions with specific electronic properties, using computer terminals. Supplemental task · Task 12584 · Rated by 89 people who do the job, December 2006 13. Count, sort, and weigh processed items. Supplemental task · Task 12585 · Rated by 90 people who do the job, December 2006 14. Calculate etching time based on thickness of material to be removed from wafers or crystals. Supplemental task · Task 12586 · Rated by 89 people who do the job, December 2006 15. Inspect equipment for leaks, diagnose malfunctions, and request repairs. Supplemental task · Task 12587 · Rated by 90 people who do the job, December 2006 16. Align photo mask pattern on photoresist layer, expose pattern to ultraviolet light, and develop pattern, using specialized equipment. Supplemental task · Task 12588 · Rated by 90 people who do the job, December 2006 17. Stamp, etch, or scribe identifying information on finished component according to specifications. Supplemental task · Task 12589 · Rated by 91 people who do the job, December 2006 18. Scribe or separate wafers into dice. Supplemental task · Task 12591 · Rated by 89 people who do the job, December 2006 19. Connect reactor to computer, using hand tools and power tools. Supplemental task · Task 12592 · Rated by 89 people who do the job, December 2006 20. Measure and weigh amounts of crystal growing materials, mix and grind materials, load materials into container, and monitor processing procedures to help identify crystal growing problems. 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