• Title/Summary/Keyword: insertion layer

Search Result 246, Processing Time 0.024 seconds

Insertion Loss Analysis According to the Structural Variant of Interposer (인터포저의 디자인 변화에 따른 삽입손실 해석)

  • Park, Jung-Rae;Jung, Cheong-Ha;Kim, Gu-Sung
    • Journal of the Microelectronics and Packaging Society
    • /
    • v.28 no.4
    • /
    • pp.97-101
    • /
    • 2021
  • In this study, Insertion loss according to the structural variant of interposer to Through Silicon Via (TSV) and Redistributed Layer (RDL) was studied through design of experiment. 3-Factors was considered as a variant, TSV depth, TSV diameter, RDL width with factor arrangement method and the response surface method from 400 MHz to 20 GHz. As a result, it was confirmed that as the frequency increased, the effect of RDL width was decreased and the effect of TSV depth and TSV diameter was increased. Also within the analysis range, to increasing RDL width, decreasing TSV depth, and fixing TSV diameter about 10.7 ㎛ was observed optimal result of Insertion loss.

The Effects of Surface Insulation Layer on the Magnetic Properties of Nanocrystalline Alloy Ribbons (표면 절연층이 나노결정립 합금 리본의 자기적 특성에 미치는 영향)

  • Oh, Young-Woo
    • Journal of the Korean Magnetics Society
    • /
    • v.17 no.6
    • /
    • pp.226-231
    • /
    • 2007
  • High frequency loss property of nanocrystalline amorphous ribbon with a high resistivity insulation layer of $TiO_2$ and $SiO_2$ was studied. The insulation layer was fabricated by sol-gel method using dip-coating. The optimum composition ratio of metal alkoxide and slurry for fabrication of insulation layer was established and insulation layer with high adhesion was coated on the nanocrystalline amorphous ribbon. Frequency loss of magnetic core material manufactured on nanocrystalline amorphous ribbon with the surface insulation layer decreased over 40 % compared with that of magnetic core material without surface insulation layer. The insertion loss of an inductive coupler, which was prepared by using magnetic core material coated insulation layer, decreased due to reduction of frequency loss for magnetic core material and insertion loss decreased in proportion to frequency.

Design of a Local Area Computer Network by the Buffer Insertion Interface (버퍼삽입 인터페이스 방식에 의한 지역컴퓨터 네트워크 설계)

  • 권영수;강창언
    • Proceedings of the Korean Institute of Communication Sciences Conference
    • /
    • 1984.10a
    • /
    • pp.7-10
    • /
    • 1984
  • In this paper, the advantages of buffer insertion access method in comparison with other access methods to local area networks are analyzed. Sending and Receiving protocols in a data link layer are designed by a software method, We have derived both qeueing delays and the response time for the performance model that is proposed in this paper, and using the computer simulation, analyzed the performance for the proposed model in terms of the throughput rate- response time characteristrics. Based on the proposed model, the hardware design is implemented.

  • PDF

Effect of Tool Shape and Insertion Depth on Joining Properties in Friction Stir Spot Welding of Aluminum Alloy/high-strength Steel Sheets (알루미늄 합금/고장력 강판 겹치기 마찰교반점용접에서 공구 형상과 삽입 깊이에 따른 접합 특성)

  • Su-Ho An;Young-Keun Jeong
    • Journal of Powder Materials
    • /
    • v.31 no.1
    • /
    • pp.37-42
    • /
    • 2024
  • Friction stir spot welding (FSSW) is a solid-state joining process and a rapidly growing dissimilar material welding technology for joining metallic alloys in the automotive industry. Welding tool shape and process conditions must be appropriately controlled to obtain high bonding characteristics. In this study, FSSW is performed on dissimilar materials AA5052-H32 aluminum alloy sheet and SPRC440 steel sheet, and the influence of the shape of joining tool and tool insertion depth during joining is investigated. A new intermetallic compound is produced at the aluminum and steel sheets joint. When the insertion depth of the tool is insufficient, the intermetallic compound between the two sheets did not form uniformly. As the insertion depth increased, the intermetallic compound layer become uniform and continuous. The joint specimen shows higher values of tensile shear load as the diameter and insertion depth of the tool increase. This shows that the uniform formation of the intermetallic compound strengthens the bonding force between the joining specimens and increases the tensile shear load.

Characteristics of AlN thin films for SAW filters based on substrates (기판의 종류에 따른 SAW 필터용 AlN 박막의 특성)

  • Ko, Bong-Chul;Nam, Chang-Woo
    • Journal of Sensor Science and Technology
    • /
    • v.16 no.3
    • /
    • pp.240-245
    • /
    • 2007
  • AlN thin film for SAW filter application was deposited on (100) silicon, sapphire, $Si_{3}N_{4}$/Si, and $Al_{2}O_{3}$/Si substrates by reactive magnetron sputtering method, respectively. The structural characteristics were dependent on the structure of substrates. Scanning Electron Microscope (SEM), X-ray Diffraction (XRD) and Atomic Force Microscope (AFM) have been used to analyze structural properties and preferred orientation of AlN thin films. Preferred orientation and SAW characteristic of AlN were improved by insertion of $Al_{2}O_{3}$ buffer layer. Insertion loss of SAW devices using AlN/Si and AlN/$Al_{2}O_{3}$/Si were about 33.27 dB and 30.20 dB, respectively.

Implementation of Low Loss Radome with Hexa mesh for Ku-Band

  • Seo, Kang;JeongJin, Kang
    • International Journal of Advanced Culture Technology
    • /
    • v.10 no.4
    • /
    • pp.555-560
    • /
    • 2022
  • In this study, the insertion loss and phase delay according to the multi-layer structure radome parameters were analyzed using the boundary value solution approach, and the multi-layer structure and hexa mesh structures with low-loss electrical characteristics for the Ku-band transmission/reception frequency of 10.7 ~ 14.5 GHz were designed and manufactured. A hexa mesh was applied to minimize radio wave transmission and scattering, which lowered the transmittance refractive index according to the radio incident angle and minimized dielectric loss through high-density foam. Similar to the simulation result, the transmission loss obtained the gain in a specific receiving frequency band, and in the transmission frequency band, an excellent low loss characteristic was obtained with an insertion loss of 0.8dB or less. The results of this study can be used in radio transmission radomes of low-weight, low-cost end-system protection devices.

The Changes of NO, nNOS, Norepinephrine by Acupucture at LU7, HT5, PC6 Acupoints in Rats (수삼음경의 락혈 침자가 백서의 혈위 조직내 nNOS. NO와 조직 및 혈장 Norepinephrine의 변화에 미치는 영향)

  • Shin, Wook;Lee, Yumi;Lee, Kyoungin;Choi, Donghee;Kim, Mirae;Na, Changsu;Kim, Sunmin;Pyo, Byoungsik;Youn, Daehwan
    • Korean Journal of Acupuncture
    • /
    • v.33 no.2
    • /
    • pp.75-83
    • /
    • 2016
  • Objectives : A previous study demonstrated that the connecting points of three yang meridians attenuated changes of nNOS, and Norepinephrine(NE) in rats. The current study investigated the changes in nNOS, NO and NE upon the needle insertion at varying depths at the connecting point of three yin meridians of the hand. Methods : Needles were inserted into rats, on both left and right sides of the connecting point, including the LU7, HT5 and PC6 acupoints which are three yin meridians of the hand. After insertion, needles were retained for five minutes. Each acupuncture groups were treated acupuncture at each acupoint and at the depths of superficial, middle and deep layer. After the retention, blood was drawn via cardiac puncture, and tissues of each point near meridian vessel was extracted to examine the changes in the expression of nNOS, NO and NE. Results : Compared with the superficial layer group, nNOS production significantly decreased in the middle and deep layer at LU7 acupoint group and in the deep layer at HT5, PC6 acupoint group. The tissue NE decreased in the deep layer on PC6 acupoint and the plasma NE increased at the middle layer at LU7 acupoint group but decreased at the deep layer on at LU7 acupoint group. Conclusions : Acupuncture at connecting points of three yin meridians of the hand can regulate the activities of nNOS, and NE.

Low-Informative Region Detection based on Multi-Layer Perceptron for Automatical Insertion of Virtual Advertisement in Sports Image (스포츠 영상 내에서 자동적인 가상 광고 삽입을 위한 다층퍼셉트론 기반의 저정보 영역 검출)

  • Jung, Jae-Young;Kim, Jong-Ha
    • Journal of Digital Contents Society
    • /
    • v.18 no.1
    • /
    • pp.71-77
    • /
    • 2017
  • Virtual advertisement is an advertising technique that using computer graphic in a media production such as a sports image for inserting product image, logo, advertising slogan, etc. Recently, the image insertion of virtual advertisement is actively spreading due to the satisfaction of technical element for the image insertion of virtual advertisement in sports advertisement by increasing of the image processing technology and the computing performance. In addition, image processing technology for automatic insertion has become an important research field in the virtual advertisement field. In this paper, we propose the method of extracting less-informative region by using image processing technique and machine learning to insert a virtual advertisement automatically in sports image. The proposed method analyzes the brightness level of image through the histogram and extracts the less-informative region using the machine learning method.