scholarly journals A Mass Production of Thick-Film Car Voltage Regulators

1978 ◽  
Vol 5 (1) ◽  
pp. 45-48 ◽  
Author(s):  
D. A. Bianchi ◽  
P. Faravelli ◽  
G. S. Rodari
Keyword(s):  
Thick Film ◽  
Mass Production ◽  
Functional Performance ◽  
Point Of View ◽  
Voltage Regulators ◽  
Voltage Regulator ◽  
Active Devices

The technological solutions chosen for a car-voltage regulator now in mass production (thick-film hybrid with standard encapsulated active devices) are discussed from the point of view of functional performance, producibility and reliability.

scholarly journals Hybrid Voltage Regulator for Automobiles

1981 ◽  
Vol 8 (3-4) ◽  
pp. 229-233
Author(s):  
Akihiro Sawamura ◽  
Tadashi Takahashi ◽  
Sei-Ichi Denda
Keyword(s):  
Thick Film ◽  
Temperature Cycling ◽  
Voltage Regulators ◽  
Voltage Regulator ◽  
Reverse Voltage ◽  
Pattern Design ◽  
Blocking Voltage ◽  
Reverse Blocking ◽  
Automobile Use ◽  
Surge Current

In the course of the development of hybrid voltage regulators for automobile use, increasing the reverse blocking voltage with decreasing of saturation voltage for output power darlington transistors, the capability of monolithic IC chip against surge pulses generated in cars, and an improvement of the pattern design of thick film in order to withstand temperature cycling, have been important subjects. Power darlingtons have more than 150 V of reverse voltage as well as large secondary breakdown capacity and less than 1.2 V of saturation voltage. A monolithic chip having small saturation voltage and more than 500 mA of surge current capability, has been developed. A neck-shaped thick film pattern was developed to make soldering in a controlled manner. The problems in the earlier stage with surge current and temperature cycling have been almost solved by these improvements.In this paper the characteristics of the transistor and the monolithic chip the structure of the device and related problems observed in temperature cycling are described.

Mikroalgák mint természetes hatóanyagforrások

2018 ◽  
Vol 159 (18) ◽  
pp. 703-708
Author(s):  
Gábor Vasas
Keyword(s):  
Mass Production ◽  
Higher Plants ◽  
Herbal Medicines ◽  
Point Of View ◽  
Historical Background ◽  
Herbal Products ◽  
Chlorella Sp ◽  
Economic Significance ◽  
Preclinical And Clinical Studies ◽  
Microalgal Species

Abstract: More than 90% of herbal products and herbal medicines have been derived from higher plants recently, but due to independent circumstances, several photosynthetic microalgal species are in focus in this point of view. In the last 50 years, many carbohydrate-, peptide-, terpenoid-, alkaloid- and phenol-type components were described from algae because of the developing structural determination and analytical methods, algae mass production and also artificial algae technologies. At the same time, based partly on traditional causes and partly on the clinical and preclinical data of today, some dried products of algae are directly used as food supplements. Hereinafter, the historical background, economic significance and metabolic background of the mostly used microalgal species will be reviewed. The diverse metabolite production of these organisms will be demonstrated by some molecules with special bioactivity. Several preclinical and clinical studies will be described relating to the microalgal species Spirulina sp., Chlorella sp., Haematococcus sp. and Dunaliella sp. Orv Hetil. 2018; 159(18): 703–708.

scholarly journals Minimum dropout voltage on a serial pnp transistor of a moderately loaded voltage regulator in a gamma radiation field

2012 ◽  
Vol 27 (4) ◽  
pp. 333-340 ◽  
Author(s):  
Vladimir Vukic
Keyword(s):  
Integrated Circuit ◽  
High Current Density ◽  
Negative Influence ◽  
Radiation Hardness ◽  
Voltage Regulators ◽  
Current Gain ◽  
Voltage Regulator ◽  
Emitter Current ◽  
Moderate Load ◽  
Loaded Voltage

The main examined value in an experiment performed on moderately loaded voltage regulators was the serial pnp transistor?s minimum dropout voltage, followed by the data on the base current and forward emitter current gain. Minimum dropout voltage decreased by up to 12%, while the measured values of the forward emitter current gain decreased by 20-40% after the absorption of a total ionizing dose of 500 Gy. The oxide trapped charge increased the radiation tolerance of the serial lateral pnp transistor owing to the suppression of interface trap formation above the base area. Current flow through the serial transistor of the voltage regulator had an influence on the decrease in the power pnp transistor?s forward emitter current gain. Due to the operation with a moderate load of 100 mA, loss of emitter injection efficiency was not as important as during the operation with high current density, thus eliminating the negative influence of emitter crowding on the radiation hardness of the voltage regulator. For a moderate load, gain in the negative feedback reaction was enough to keep output voltage in the anticipated range. Only information procured from tests of the minimum dropout voltage on the moderately loaded voltage regulators were not sufficient for unequivocal determination of the examined integrated circuit?s radiation hardness.

scholarly journals Design for manufacturability in virtual environment using knowledge engineering

2014 ◽  
Vol 5 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Julian Jakubowski ◽  
Jozef Peterka
Keyword(s):  
Mass Production ◽  
Knowledge Engineering ◽  
Complex Geometry ◽  
New Products ◽  
Design For Manufacturing ◽  
Point Of View ◽  
Design For Manufacturability ◽  
Design Stage ◽  
Early Design ◽  
Early Design Stage

Abstract Design for manufacturing (DFM) strategies help companies to develop new products that are feasible to manufacture. In the early stages of design all engineering activities are initiated in computer aided systems. When the design is finished, the process of manufacturing and production planning begins. Issues often occur at this point because two teams, designers and manufacturers, have been working separately. The resulting question is: ‘how can Knowledge Engineering (KE) be used effectively to enhance manufacturability during early design?’ Even if the most complex geometrical product can be realized using today’s technologies such as rapid prototyping it is only true in unit production. In lot and mass production where CNC machines are used, complex geometry causes a number of difficulties. So it is important to investigate the project carefully in the early design stage from the point of view of whether it will be possible to manufacture.

Virtual engineering: Methods and tools

2005 ◽  
Vol 219 (5) ◽  
pp. 413-421 ◽  
Author(s):  
A Bernard
Keyword(s):  
Life Cycle ◽  
Mass Production ◽  
Product Life Cycle ◽  
Integrated Design ◽  
Point Of View ◽  
Virtual Engineering ◽  
Knowledge Based ◽  
Management Processes ◽  
Design And Manufacturing ◽  
Short Time

This paper presents an overview of actual approaches in virtual engineering, mainly from the design point of view. The evolution of the market has necessitated the reduction of time-to-market, essentially because the product life cycle is shorter, but also because it is very important to proceed more rapidly from an initial conception to a mass production object. As a result of newly evolved software DOI: environments, knowledge-based systems, and product data management, processes for integrated design and manufacturing for new products have emerged. Owing to this evolution of virtual engineering technologies, it has become possible today to validate parts representative of mass production within a very short time. This paper provides an overview of the actual methods and tools in all the components that affect the speed and efficiency of product development, in particular all the possibilities available to the designer, from the earliest stages of a product's life cycle.

scholarly journals Reliability Considerations of Flip Chip Components for Automotive Electronic Applications

1981 ◽  
Vol 9 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Keisuke Sugiyama ◽  
Isao Bansaku ◽  
Naoharu Tsuzimoto ◽  
Iwao Tachikawa
Keyword(s):  
Thick Film ◽  
Environmental Conditions ◽  
Flip Chip ◽  
High Reliability ◽  
Electronic Devices ◽  
Electronic Equipment ◽  
Voltage Regulators ◽  
Automotive Electronic ◽  
Ic Technology ◽  
Thick Film Technology

Electronic devices for automotive electronic applications have to be operated under extreme environmental conditions and therefore are required to have higher reliability compared with general electronic equipment. Recently automotive voltage regulators, ignition systems, etc. have been changing from mechanical constructions to electronic ones using thick film technology.This paper presents results that shows that our flip chip IC technology can satisfy the high reliability requirements of automobile electronics.

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