고두께 유리-실리콘의 대면적 양극접합에 관한 연구

김건년,이보나,박효덕,신상모,이근혁,권혁채 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

In this paper, we studied the anodic bonding of 5-inch silicon and #7740 Pyrex glass wafers with a thickness of 3mm by using the EV501 bonder and the Karl Suss SB6 bonder. The test conditions for anodic bonding of the EV501 bonder system with a full field electrode were temperature of 400 ℃ and voltage of 800V in a chamber pressure of 1X10^(3)mbar. The SB6 bonder with a star shaped electrode was tested at the temperature and voltage of 450 ℃ and 1300V in the atmosphere, respectively. As the results of test, we obtained the void free samples regardless of shape of substrates such as etched wafers with cavities and drilled glasses with holes.

Si Bulk Micromachining을 위한 Wafer Rolling Etching 및 그 특성

김건년,이보나,박효덕,신상모,공경준,장동근,김병철,권혁채,이봉희 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

A wafer rolling etching system for the silicon bulk micromachining has been designed and fabricated. The silicon diaphragms were anisotropically etched in a 24.5 weight percent KOH solution. Compared to the conventional KOH etching systems, pyramidal hillocks, and wave-shaped structures on the etched surfaces were greatly reduced by using this system. After etching for time of 438 minutes, the average etched depth and the etch-rate were measured to be 537μm and 1.22μm/min, respectively. The average etching uniformity of etching depth was 0.87% in 5-inch wafer. Our results showed that the wafer rolling method enhanced etch uniformity and etch rate.

回腸穿孔性腹膜炎의 手術式에 對한 檢討

金相直,黃一愚,徐輔祥,尹健鎬 경북대학교 의학연구소 1966 慶北醫大誌 Vol.7 No.1

Peritonitis caused by the perforation of the ileum often is a complications of the systemic diseases such as typhoid fever or other kinds of salmonellosis. Since this complication usually takes place at the second or third week of the disease course, the patient's condition is generally poor. The choice of the methods of surgical operation for the peritonitis depends upon the general condition of the patient and upon the intraabdominal state. During 5 years (1957-1962), of the 141 cases, 80 cases were operated by the method of the debridement and simple closure, 60 by recection of the involved intestine followed by end-to-end anastomosis and one case was treated by exteriorization of the involved ileum expecting the secondary surgical intervention after his general condition had improved. The rates of the mortality and of the reperforation were higher in the former group. Since Oct.1962, we treated 46 cases of the peritonitis by the method of simple closure and resection alternately except extremely poor risk patients in attempt to establish more favorable result. The result of these studies shows that the mortality rate was lower in the resection group and postoperative complications were almost epual.

Furosemide 및 Hydrochlorothiazide가 家兎 賢皮質의 Na-K-ATPase 活性에 미치는 影響

金寶年,劉寬熙,朴海根 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.2

The furosemide and hydrochlorothiazide are well known diuretics that inhibit the sodium active reabsorption in the renal tubules. Therefore it was suggested that they had a effect on the Na-K-ATPase activity, but the reports of these drugs on the Na-K-ATPase activity are rare. Author attempted to investigate the action of furosemide and hydrochlorothiazide on the Na-K-ATPase activity in the rabbit renal cortical homogenate. The results were summarized as follows: 1. The control values of Na-K-ATPase activity in the renal cortical homogenate were 1.80±0.27μM pi/10 min/㎎ protein in experimental group of furosemide and 1.58±0.29μM pi/10 min/㎎ protein in that of hydrochlorothiazide. 2. Furosemide tended to increase the Na-K-ATPase activity but was not statistically significant. From the above results, it was suggested that furosemide and hydrochlorothiazide had a diuretic action without the influence of Na-K-ATPase activity.

廻腸 穿孔性腹膜炎의 手術式에 擡한 檢討

金相直,黃一愚,徐輔祥,尹健鎬 慶北大學校 醫科大學 1966 慶北醫大雜誌 Vol.7 No.1

졸겔법에 의한 티탄산납 제조 및 유기산 흡착특성

김주호,송지훈,신보철,한상오,송근호,이광래 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

Generally PbTiO3 if manufactured in a form of thin films which is useful for the application infrared sensors and non-volatile memory devices. Moreover PbTiO3 has a characteristic of adsorption for organic acid as well as electronic property. Organic acid adsorption properties of PbTiO3 powder prepared by sol-gel method was compared with the powder purchased from Aldrich Co. Crystallization and particle size of PbTiO3 are influenced by process variable, such as dilution of sol solution, catalysis, calcination temperature, calcination time, etc. As the size of PbTiO3 power decreased until several nanometers, adsorption of acetic acid and formic acid was increased 1.5-fold and 1.2-fold respectively

분사법에 의한 탄산칼슘 제조

신보철,한상오,김주호,송지훈,송근호,이광래 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

본 연구는 탄산가스화법에 의한 탄산칼슘 입자 제조 공정에 있어서, 탄산가스로 채워진 반응기에 수산화칼슘 슬러리를 분사하는 방법으로 탄산칼슘 입자를 제조하였다. 수산화 칼슘의 농도(0.25~1.0wt%), 분사압력(0.5kgf /㎠~1.5kgf /㎠) 및 반응기 온도(20℃, 28℃)의 변화에 따른 생성된 탄산칼슘을 관찰하였다. 수산화 칼슘의 농도가 비교적 높으면(0.75wt%, 1.0wt%), 생성물의 pH와 전도도는 높게 나타났다. 분사압력에 의한 탄산칼슘 제조의 변화는 분사압력이 높아질수록(1.5kgf /㎠), pH와 전도도는 높게 측정되었다. 그러나, 수산화 칼슘의 농도와 분사압력의 변화가 탄산칼슘의 입자크기, 형태, 결정구조에 영향을 미치지는 않았다. 반응기의 온도가 28℃에서 생성된 탄산칼슘은 1.0㎛이하의 칼사이트 상 입자가 제조되었으며, 20℃에서 생성된 탄산칼슘은 0.5㎛이하의 칼사이트 상 입자가 제조되었다. 반응기의 온도가 낮아질수록 탄산칼슘 입자의 크기가 작아짐을 알 수 있었다. For the preparation of calcium carbonate particles from aqueous Ca(OH)2 slurry, carbonation reaction of aqueous Ca(OH)2 slurry was carried out by spouting the aqueous slurry of Ca(OH)2 into reactor filled with CO2 gas. The concentration of Ca(OH)2 varies from 0.25wt% to 1.0wt%, nozzle pressure from 0.5kgf /㎠ to 1.5kgf /㎠, and reactor temperature were set at 20℃ and 28℃. With relatively high concentration of 0.75wt% and 1.0wt% of Ca(OH)2, pH and conductivity of product-stream were observed high value. High pH and conductivity were observed at high nozzle pressure of 1.5kgf /㎠. The concentration of Ca(OH)2 and nozzle pressure, however, did not change the particle size and shape of calcium carbonate synthesized by carbonation reaction. The reaction temperature affected particle size. At reactor temperatures of 28℃ and 20℃, the particle sizes were about 1.0㎛ and 0.5㎛, respectively. Crystal structure of calcium calcium carbonate was of calcite. When reactor temperature was lower, the size of calcium carbonate particle was smaller.

회분식 반응기에서의 공정변수 변화에 의한 침강성 탄산칼슘 제조

신보철,한상오,김주호,송지훈,송근호,이광래 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

For the preparation of calcium carbonate particles from aqueous Ca(OH)2 slurry, carbonation reaction of aqueous Ca(OH)2 slurry was carried out by batch method the CO2 into reactor filled with aqueous slurry of Ca(OH)2. The concentration of Ca(OH)2 varies from 1.00 to 7.00wt%, reactor temperature at 20 and 40℃, and reactor pressure from atmospheric pressure to 6.0kgf/cm2. Crystal structure of calcium carbonate was of calcite, the particle size were about 0.05 ∼2.0㎛, and the particle shape was cubic and spindle. When reactor temperature was higher, particle size of calcium carbonate was bigger and particle share was varied, but reaction rate was increased. When reactor pressure was higher, particle size of calcium carbonate was smaller, particle shape was cubic, and reaction ramie was increased.

집적화된 실리콘 압력센서의 출력전압 보상파라미터 추출 및 그 특성

이보나,김건년,박효덕,신상모,이경탁,김찬,권혁채,이상조,박현주 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

An integrated silicon pressure sensor has been designed, fabricated and tested. The signal conditioning circuits were designed to include calibration and temperature compensation of output voltage through trimming of diffusion and ion-implanted resistors. Before trimming of resistors, the compensation parameters such as pressure sensitivity, temperature coefficient of pressure sensitivity, temperature coefficient of piezoresistors and pressure sensitivity of piezoresistors were measured. Then offset voltage, span, and temperature coefficients of offset voltage and span were calibrated by trimming of resistors. The measured output voltage met our design specification and simulation value above room temperature. But, the measured output voltage at -30°C deviated from our design specification and simulation value because the offset voltages were found to vary randomly as a function of temperature.

破裂性 大動脈洞瘤 : 2 例報告 Two Cases Report with Review of the Literatures

成圭寶,徐興錫,金三鉉,金近鎬 한양대학교 의과대학 1983 한양의대 학술지 Vol.3 No.2

Rupture of an aortic sinus aneurysm into a cardiac chamber results in an aortic sinus fistula causing left-to-right shunt of sudden onset. But they are susceptible to surgical treatment and cure. Therefore, accurate diagnosis preoperatively are mandatory for successful repair. Two surgically proved and repaired cases of rupture of aneurysm of sinus of Valsalva are reported with a brief review of the literatures.