scholarly journals Study on effect of drilling rotational speed and tool wear on chip evacuation of micro drilling of printed circuit board

2016 ◽  
Vol 82 (834) ◽  
pp. 15-00463-15-00463 ◽  
Author(s):  
Hiromi YOSHIMURA ◽  
Yu KATAHIRA ◽  
Hidehito WATANABE ◽  
Taiju YAMASHITA
Keyword(s):  
Tool Wear ◽  
Rotational Speed ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Printed Circuit ◽  
Micro Drilling ◽  
On Chip

scholarly journals Design and Implementation of SOC-Based Noncontact-Type Level Sensing for Conductive and Nonconductive Liquids

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
J. L. Mazher Iqbal ◽  
Munagapati Siva Kishore ◽  
Arulkumaran Ganeshan ◽  
G. Narayan
Keyword(s):  
Printed Circuit Board ◽  
System On Chip ◽  
Circuit Board ◽  
Sensor Technology ◽  
Electromechanical Systems ◽  
Printed Circuit ◽  
Design And Implementation ◽  
Hardware System ◽  
On Chip

In contrast to the existing electromechanical systems, the noncontact-type capacitive measurement allows for a chemically and mechanically isolated, continuous, and inherently wear-free measurement. Integration of the sensor directly into the container’s wall offers considerable savings potential because of miniaturization and installation efforts. This paper presents the implementation of noncontact (NC)-type level sensing techniques utilizing the Programmable System on Chip (PSoC). The hardware system developed based on the PSoC microcontroller is interfaced with capacitive-based printed circuit board (PCB) strip. The designer has the choice of placing the sensors directly on the container or close to it. This sensor technology can measure both the conductive and nonconductive liquids with equal accuracy.

Experimental Study on PCB Micro Drilling Force

2012 ◽  
Vol 246-247 ◽  
pp. 1017-1021 ◽  
Author(s):  
Feng Gong ◽  
Bai Qiang Chen ◽  
Ji Bin Li
Keyword(s):  
Experimental Study ◽  
Cutting Force ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Drilling Machine ◽  
Drilling Force ◽  
Printed Circuit ◽  
Market Competitiveness ◽  
Pcb Design ◽  
Micro Drilling

With the development of high density, multi-functions, miniaturization and multi-layer on printed circuit board (PCB) design, great challenges have been presented to the miniaturization of drilling on PCB. In order to meet the hole precision, quality and improve the performance, efficiency of mechanical drilling, further research should be done on the cutting state. Kistler high-precision micro-force platform was used in this paper to test and analyze the cutting force, investigate the general laws of micro drilling, and optimize the parameters for HANS PCB drilling machine. Thereby, to improve the efficiency and precision of the drilling, range of processing, and increasing market competitiveness.

An Optimized On-Chip Boost-Type DC-DC Converter With an On-Board Inductance

2014 ◽  
Author(s):  
Paul C.-P. Chao ◽  
Ching-Hua Kuan ◽  
Jia-Wei Su
Keyword(s):  
Printed Circuit Board ◽  
High Efficiency ◽  
Rapid Development ◽  
Current Drive ◽  
Circuit Board ◽  
Electronic Products ◽  
Fully Integrated ◽  
Printed Circuit ◽  
Limited Output ◽  
On Chip

The rapid development of portable electronic products in recent years increases demands of varied displays. With resolutions of panel sizes and pixels under current drive capability improved, this study is intended for designing an inductive DC boost converter circuit for displays, which is fully integrated with IC fabrication technology [1][2]. Most of current displays employ capacitances for voltage-boosting to supply relative high-voltage biases to displays. These booster circuits are in small sizes and with high efficiency, but limited output currents, which are inadequate for some of large-sized displays. To remedy the problem, an on-board, small-sized inductor in the forms of coils in a printed circuit board (PCB) is proposed for a superior solution. This PCB-type inductor can be incorporated into the same board with other drive chips for the displays, while offering large, adequate current, as an incapable task via an on-chip coil.

The Investigation of Thrust Force of Printed Circuit Board Drilling

2011 ◽  
Vol 496 ◽  
pp. 259-265 ◽  
Author(s):  
Li Juan Zheng ◽  
Cheng Yong Wang ◽  
Yun Peng Qu ◽  
Li Peng Yang ◽  
Yue Xian Song
Keyword(s):  
Tool Wear ◽  
Feed Rate ◽  
Copper Foil ◽  
Printed Circuit Board ◽  
Thrust Force ◽  
Spindle Speed ◽  
Circuit Board ◽  
Wall Roughness ◽  
Printed Circuit ◽  
The Difference

This work is focused on the investigation of the influence of the materials of PCB, feed rate, spindle speed and tool wear on thrust force when drilling PCB using 0.3 mm diameter cemented tungsten carbide drills. The results indicate that thrust force increases with feed rate and drill wear, but decreases with spindle speed firstly and then increases with it within the cutting range tested. Thrust force caused by the copper foil is much larger than that caused by the epoxy glass fiber cloth when feed rate is low. However, the difference between them decreases as feed rate increases. The thickness of nail head increases with thrust force. The accuracy of hole location increases with thrust force firstly but decreases afterward. The influence of thrust force on hole wall roughness is not obvious.

scholarly journals Load-dependent power transfer efficiency for on-chip coils

2021 ◽  
Author(s):  
Joakim Nilsson ◽  
Johan Borg ◽  
Jonny Johansson
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Transfer Efficiency ◽  
Cmos Process ◽  
Power Transfer ◽  
Single Chip ◽  
Process Technology ◽  
Printed Circuit ◽  
Power Transfer Efficiency ◽  
On Chip

AbstractThis paper presents a theory for the power transfer efficiency of printed circuit board coils to integrated circuit coils, with focus on load-dependence for low-power single-chip systems. The theory is verified with electromagnetic simulations modelled on a 350 nm CMOS process which in turn are verified by measurements on manufactured integrated circuits. The power transfer efficiency is evaluated by on-chip rectification of a 151 MHz signal transmitted by a spiral coil on a printed circuit board at 10 mm of separation to an on-chip coil. Such an approach avoids the influence of off-chip parasitic elements such as bond wires, which would reduce the accuracy of the evaluation. It is found that there is a lower limit for the load below which reducing the power consumption of on-chip circuits yield no increase in voltage generated at the load. For the examined process technology, this limit appears to lie around 56 k$$\Omega$$ Ω . The paper is focused on the analysis and verification of the theory behind this limit. We relate the results presented in this work to the application of wireless single-chip temperature monitoring of power semiconductors and conclude that such a system would be compatible with this limit.

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