Medical Face Shields – 3D Printing


Helping the Medical Community – Have a 3D Printer? Medical Face Shields during the Th COVID-19 outbreak continues to expand globally. Information from healthcare organizations say that some distributors have placed certain types of personal protective equipment (PPE) on allocation, therefore, Basing the quantity of Medical Face Shields available to the healthcare organization on previous usage, not projected use.  This formula greatly puts the front-line health workers at great risk. Medical Face Shields simple in design, produced and assembled by hobbyists on their own home 3D printers.  Searching for a way to help the medical workforce?  Already have a 3D [...]

Medical Face Shields – 3D Printing2020-09-15T12:38:40-07:00

Alternative to Polystyrene Foam


Alternatives for Polystyrene Foam, Made from petroleum, Styrofoam is used in everything from coffee cups, building materials and construction, transportation, and packaging industries. Made from toxic ingredients, depends on petroleum.

Alternative to Polystyrene Foam2020-08-03T00:56:43-07:00

Semiconductor Industry Growth Continues


  Worldwide semiconductor revenue hit and all-time-record of $120.8B in Q2 2018, which represents an almost 4.5% quarter over quarter growth. More Integrated Circuits are being put into traditional products, such as enterprise data storage units and smart phones. Now cars, refrigerators, and a whole host of Internet of Things, are integrating chip sets into their products as well. Memory dominates chip production and usage, and has helped to keep Samsung in its leadership position. (Record Fab Spending) Samsung Remains the Number One Semiconductor Manufacturer Samsung posed Q218 revenue of $19.2B and Intel came in at $16.7B. Uncertainty at [...]

Semiconductor Industry Growth Continues2019-09-13T15:21:35-07:00

Semiconductor Record Fab Spending 2018


Good News for Materials Scientists - Semiconductor Record Spending Fab spending reports show unprecedented high semiconductor equipment sales are being driven by a handful of well-known companies, and also by several new Chinese companies entering the semiconductor marketplace. An increase in overall fab spending (greenfield construction and equipment together) of 54 percent year-over-year (YoY) in China is expected.  Total spending in China rose from $3.5 billion in 2016, to $5.4 billion in 2017, and then is anticipated to be $8.6 billion in 2018, another 60 percent year-over-year (YoY). The demand for Materials Scientists to develop manufacturing processes and engineers [...]

Semiconductor Record Fab Spending 20182019-09-13T14:55:11-07:00

NAND Flash – 11 Myths Still Floating Around


Think You Know NAND Flash?  NAND flash has become the de facto memory standard in the years since Toshiba first introduced it almost three decades ago. However, many misconceptions remain to this day about its use. A wide variety of NAND flash-memory products are available, all with significantly different features and capabilities.    All NAND flash has the same interface. NAND flash, introduced by Toshiba more than 20 years ago, is available in both the asynchronous and toggle-mode interfaces. The original asynchronous interface is found mostly in lower-density devices (<32 Gb), while high-density NAND flash (≥64 Gb) [...]

NAND Flash – 11 Myths Still Floating Around2019-09-13T14:50:49-07:00

Semiconductor Worldwide: Samsung Takes Over


Samsung topples Intel as top dog semiconductor market share  Gartner beancounters say price rises driven by memory shortages propelled Samsung into the lead based on semiconductor vendor revenue, vaulting past Intel and its CPUs. The largest memory supplier, Samsung Electronics, gained the most semiconductor market share and took the No. 1 position from Intel – the first time Intel has been toppled since 1992. Memory accounted for more than two-thirds of all semiconductor revenue growth in 2017, and became the largest semiconductor category.  DRAM prices rose 44 per cent from 2016 to 2017, and NAND flash prices went up [...]

Semiconductor Worldwide: Samsung Takes Over2019-09-13T14:51:10-07:00

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 7


  Wind Load Comparison between CFD and ASCE 7 for Rooftop shapes Welcome back to our blog series on the phenomenon called Wind Load CFD Modeling and how it affects civil and mechanical engineers.  Wind Load is the force that blowing wind exerts on any device or structure that extends above ground level.  After an initial introduction to the factors that affect wind load on an object, I compared three different sets of wind load calculation methods using three simple objects, hypothetically placed on a 100-foot-tall building.  Starting with generic drag equation for the first equation, added two modification coefficients [...]

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 72018-02-20T11:28:46-08:00

Flat Panel and LCD Screens, Part 2


Figure 1: Unpowered Sony Ericsson S500i LCD screen at 200x magnification In our last blog post, I wrote about some of the physics and materials science principles that go into the design and manufacture of liquid-crystal display (LCD) screens.  The eponymous liquid crystals (LCs) in such a display have to be quite small in order to create a seamless image; as I mentioned in the last entry, the subpixels (the red, green and blue elements comprising a pixel, visible in Figure 1) can be smaller than a red blood cell.  Each of these subpixels needs its own [...]

Flat Panel and LCD Screens, Part 22018-02-22T10:23:01-08:00

Layered Composite Heaters for Semiconductor Processing


Figure 1: Composite layered heater from patent  US 9,224,626 B2 Alexander Glew, Ph.D., P.E. recently contributed to a new patent on an advanced thin-film electric heaters, layered composite heaters, for CVD semiconductor processing and related technologies titled “Composite substrate for layered heaters”.  Watlow Electric, based in St. Louis, hired Glew Engineering and Dr. Glew to help develop this heater technology due to his experience in the Silicon Valley’s semiconductor industry.  As a semiconductor equipment expert and materials engineering consultant, Dr. Glew’s familiarity with semiconductor manufacturing meant he understood both the limitations of common semiconductor chuck heating methods and the techniques that [...]

Layered Composite Heaters for Semiconductor Processing2018-02-20T12:34:14-08:00

Semiconductor Safety: Pyrophoric Gases


Fig. 1 Tall Fire from Chemical We have written about pyrophoric materials in a number of Glew Engineering’s previous blogs on safety in semiconductor fabrication, but have yet to cover how to define it or its danger.  At its simplest, a pyrophoric substance is any substance that spontaneously ignites in room temperature air.  As one might imagine, spontaneous combustion on contact with the regular atmosphere we live in can be quite dangerous. Last year, Glew Engineering assisted a research lab in designing a safe gas distribution system for their plasma-enhanced chemical vapor deposition chamber.  During the initial work, the building administrators and [...]

Semiconductor Safety: Pyrophoric Gases2018-02-21T15:25:24-08:00

High-purity Gas Panels Part 11: Mass Flow Controllers


Thermal Mass Flow Controllers A mass flow controller (MFC) for each gas line in a semiconductor tool’s gas panel measures and regulates the mass flow of the gas in order to set the gas entering the process chamber to the values in the process recipe.  While pressure regulation and temperature control are needed for sensitive chemical vapor deposition (CVD), plasma etching, or thin film processes, gas flow control can be just as important. Semiconductor process recipes involve precise ratios of gas phase chemical to assure the correct stoichiomtery and reaction rates.   Due to the accuracy and precision required [...]

High-purity Gas Panels Part 11: Mass Flow Controllers2018-03-22T16:08:42-07:00

High-Purity Gas Panels Part 10: Pressure Transducers in Semiconductor Equipment


An article on pressure transducers used in semiconductor fabs and semiconductor equipment.

High-Purity Gas Panels Part 10: Pressure Transducers in Semiconductor Equipment2017-05-31T11:56:37-07:00

High-purity Gas Panels Part 9: Pressure Measurement in the Semiconductor Fab


Pressure gauges and pressure transducer use in semiconductor fabs.

High-purity Gas Panels Part 9: Pressure Measurement in the Semiconductor Fab2017-05-04T14:58:28-07:00

High-Purity Gas Panels Part 7: Gas Pressure Regulators and Pressure Control


Devices for regulating gas pressure in semiconductor processes.

High-Purity Gas Panels Part 7: Gas Pressure Regulators and Pressure Control2017-05-04T14:51:06-07:00

High-purity Gas Panels Part 3: To Abatement and Exhaust


Mechanical engineering design for high-purity processes in semiconductor fabs: process pumps, abatement and exhaust lines.

High-purity Gas Panels Part 3: To Abatement and Exhaust2017-05-05T10:55:03-07:00
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