Generally speaking, scheduling is the procedure of mapping a set of tasks or jobs
(studied objects) to a set of target resources efficiently. It is an important tool in
manufacturing and engineering, where it can have a major impact on the productivity
of a process. More specifically, as a part of a larger planning and scheduling process,
production scheduling is essential for the proper functioning of a manufacturing
enterprise. Its primary goal is to maximize throughput and optimize resource
utilization, while at the same time minimizing operating costs.
For example, a few years ago, I was the Development Tools Marketing Manager for a semiconductor manufacturer. I was speaking with the Software Development Tools Manager at our major account. My job was to help convince the customer
that they should be using our RISC processor in their laser printers. Since I owned the tool chain issues, I had to address his specific issues before we could convince him that we had the appropriate support for his design team.
Electrical consumption, especially direct or variable frequency currents, has
strongly increased over 50 years in industry. This situation explains the growth of
At the beginning, when rectifiers replaced DC machines, only diodes and
thyristors were used. Then power transistors appeared and enabled the extension of
smaller power applications for domestic use. New research topics were developed
around converters and power devices.
In accordance with the normal semiconductor manufacturing procedure, the microchip is produced on a so-called wafer. This is a slice of silicon, which may be 6 inches in diameter, upon which several hundred microchips are produced simultaneously by repeated doping, exposure, etching and washing of the surface. In the next stage of production, the microchips on the wafer are contacted using metal points and then each of the chips is individually tested for functionality.
New knowledge and tools are constantly expanding the range of applications for semiconductor devices, integrated circuits, and electronic packages. The solid-state computing, telecommunications, aerospace, automotive and consumer electronics industries all rely heavily on the quality of these methods and processes. In each of these industries, dramatic changes are underway. In addition to increased performance, next-generation computing is increasingly being performed by portable, hand-held computers. A...
Dry andwet etching techniques based onsiliconand other semiconductor technologies
are well known. For many metals, etching is a relatively cheap and well-established
technique to obtain freeform structures with dimensions in the submillimeter range.
This technique iswelldescribedinthe literature[1–5,7].Aphotosensitivepolymermask
material is applied on themetal to be etched. Themask is exposed to light via a primary
maskwithstructural layers.Here,different technologiesare applicable, andtheirdetails
The 555 timer is one of the most useful electronic devices in the
market. The 555 timer was first introduced by Signetics but today it is manufactured
by nearly all semiconductor firms. The cost of this device is low
and it is widely available. The 555 timer has lots of uses such as: Mark Space
Adjustment, Pulse Width Modulation and Inductive Current Detection just
to name a few. The 555 has some unique advantages and capabilities, such as: low-cost, high
operating voltage (5-15V) range, it is high powered and at the same time able to
be triggered by small currents.
Danaher Motion’s wide range of motion control systems and components offer customers an unprecedented choice in selecting the right solution for their particular application requirements. Our product innovations have been improving the efficiency and productivity of complex manufacturing operations for over 60 years through trusted brand names such as Dover, Kollmorgen, Pacific Scientific, Portescap and Thomson in industries as diverse as semiconductor, aerospace and defence, mobile-off-highway, packaging, medical and robotics....
In a ﬁeld-eﬀect transistor (FET), the width of a conducting channel in a semiconductor and, therefore, its current-carrying capability, is varied by the application of an electric ﬁeld (thus, the name ﬁeld-eﬀect transistor). As such, a FET is a “voltage-controlled” device. The most widely used FETs are Metal-Oxide-Semiconductor FETs (or MOSFET). MOSFET can be manufactured as enhancement-type or depletion-type MOSFETs. Another type of FET is the Junction Field-Eﬀect Transistors (JFET) which is not based on metal-oxide fabrication technique.
Silicon Carbide (SiC) and its polytypes have been a part of human civilization for a
long time; the technical interest of this hard and stable compound has been realized in
1885 and 1892 by Cowless and Acheson for grinding and cutting purpose, leading to its
manufacture on a large scale. The fundamental physical limitations of Si operation at
higher temperature and power are the strongest motivations for switching to wide
bandgap (WBG) semiconductors such as SiC for these applications.
Water scarcity directly impacts business activities, raw material supply, intermediate
supply chain, and product use in a variety of ways. Declines or disruptions in water
supply can undermine industrial and manufacturing operations where water is needed
for production, irrigation, material processing, cooling and/or washing and cleaning.
Micromechanical photonics is evolvingin interdisciplinary research and engineering
fields and merging independently developed technologies based on
optics, mechanics, electronics, and physical/chemical sciences. Manufacturing
technologies such as those of semiconductor lasers, surface micromachining
and bulk micromachiningare promotingtec hnology fusion.
Most manufacturing technologies for metallic microstructures
have their roots either in semiconductor (inmost cases, silicon) device production or
in conventional precision machining. Of these, the techniques that are well known
have been used formicrostructure dimensions. Further, they have been adapted and
improved to reach the desired precision and surface quality. In some rare cases, itwas
possible to use the same manufacturing process for macroscale and microscale
devices and to get the desired results.
In 2006 Korean shipbuilding companies got new orders of 19,585,000 CGT, which was
the highest number since 2000. Moreover in the first half of 2007 Korean shipbuilders
have received 51.3% more orders than that of a year ago. Strong demand for new
vessels was expected to continue for the next few years at least, due to expanding
world-wide seaborne trade, especially between China and USA, and increasing need of
new ships to adapt new International Maritime Organization’s requirements.