KR890001601B1 - Process of manufacture with ceramic capacitor - Google Patents
Process of manufacture with ceramic capacitor Download PDFInfo
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- KR890001601B1 KR890001601B1 KR1019860003401A KR860003401A KR890001601B1 KR 890001601 B1 KR890001601 B1 KR 890001601B1 KR 1019860003401 A KR1019860003401 A KR 1019860003401A KR 860003401 A KR860003401 A KR 860003401A KR 890001601 B1 KR890001601 B1 KR 890001601B1
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- ceramic capacitor
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- temperature
- dielectric
- rate
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003985 ceramic capacitor Substances 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title description 3
- 238000010304 firing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Ceramic Capacitors (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
제1도는 일반적인 세라믹콘덴서의 구조도.1 is a structural diagram of a general ceramic capacitor.
제2도는 종래의 세라믹콘덴서의 소성시간과 온도그래프.2 is a firing time and a temperature graph of a conventional ceramic capacitor.
제3도는 본 발명의 세라믹콘덴서의 소성시간과 온도그래프.3 is a firing time and a temperature graph of the ceramic capacitor of the present invention.
제4도는 유전체두께와 유전율의 관계를 나타낸 그래프.4 is a graph showing the relationship between dielectric thickness and dielectric constant.
제5도는 공정불량 요인에 대한 그래프.5 is a graph of the process failure factor.
제6도는 유전체두께와 파괴전압의 관계를 나타낸 그래프이다.6 is a graph showing the relationship between dielectric thickness and breakdown voltage.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
1 : 세라믹전극유전체 2 : 전극1 ceramic electrode dielectric 2 electrode
3 : 절연체 4 : 리이드선3: insulator 4: lead wire
본 발명은 세라믹콘덴서를 제작할때 세라믹콘덴서의 특성에 가장 심각한 영향을 주게되는 소성(燒成)방법을 개량시킨 것에 관한 것이다.The present invention relates to an improvement in the firing method that has the most serious influence on the characteristics of the ceramic capacitor when manufacturing the ceramic capacitor.
일반적으로 유전율이 높은 BaTiO3를 주성분으로 하고 여기에 BaZrO3, MnCO3, CoCO3, CeO2등과 같은 첨가물을 혼합하여 유전체세라믹을 소성하는 기술로 콘덴서종류의 하나인 세라믹콘덴서를 제조할 경우, 제2도에 나타난 바와같이 소성조건을 130℃/hr의 비율로 열을 가해서 약 10-12시간정도 예열한 다음 약 1200-1400℃의 최고온도에서 2-3시간 소성시키고, 이어 -130℃/hr의 비율로 10-12시간정도 냉각시켜 세라믹콘덴서를 소성하게 되는바, 이 경우 세라믹유전체의 두께와 유전율과의 관계는 제4도의 "종래"와 같고, 각 불량요인(예를들면 깨짐, 휨, 핀홀, 붙음, 반점등)에 의한 공정불량율은 제5도의 "종래"와 같으며, 유전체두께와 파괴전압과의 관계는 제6도의 "종래"와 같았다. 따라서 소성시 처음부터 일정한 비율로 최고온도까지 온도를 상승시켰을 경우에는 수율이 각 80%가 되고 불량율은 약 20%나 되어 재료낭비가 많았을 뿐만아니라 수율감소로 인해 가격상승의 요인으로 되는 단점이 있었다.In general, if the main component a high dielectric constant BaTiO 3 manufactured here BaZrO 3, MnCO 3, CoCO 3 , CeO 2 ceramic capacitor by mixing the additive, which is one of the capacitor type the dielectric ceramic as a sintering technique such as a, a As shown in Fig. 2, the firing conditions were preheated for about 10-12 hours by heating at a rate of 130 ° C / hr, and then fired for 2-3 hours at a maximum temperature of about 1200-1400 ° C, followed by -130 ° C / hr. The ceramic capacitor is fired by cooling for 10-12 hours at the ratio of. In this case, the relationship between the thickness of the dielectric dielectric and the dielectric constant is the same as in the "conventional" of FIG. 4, and each defect factor (for example, crack, warpage, The process defect rate due to pinholes, sticking, spots, etc.) is the same as in the "conventional" of FIG. 5, and the relationship between the dielectric thickness and the breakdown voltage is the same as the "conventional" of FIG. Therefore, when the temperature is raised from the beginning to the maximum temperature at a constant rate, the yield becomes 80% and the defective rate is about 20%, which leads to a lot of material waste and a decrease in yield. there was.
이에 본 발명은 상기한 단점을 해소시키기 위해서 발명된 것으로서, 세라믹콘덴서를 제작할때 예열시간을 충분히 함과 더불어 세라믹에 함유되어 있는 물이나, 메칠셀룰로우즈, 글리세린등에 의해 생성되는 바인드가스를 제거하기 위한 시간을 예열온도 500-600℃에서 5-6시간둠으로써 바인더 가스를 충분히 제거한 다음에 다시 최고온도까지 가열시켜 주므로써 유전체 두께에 대한 유전율을 향상시키고, 또 유전체두께에 대한 파괴 전압을 향상시킬 수 있을 뿐만 아니라, 수율도 향상시킬 수 있는 세라믹콘덴서의 소성방법을 제공하고자 함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the above-mentioned disadvantages, and in order to sufficiently remove the bind gas generated by water, methyl cellulose, glycerin, and the like contained in the ceramic while sufficiently preheating the time when manufacturing the ceramic capacitor. 5-6 hours at the preheating temperature of 500-600 ° C to remove the binder gas sufficiently and then heat it up to the maximum temperature to improve the dielectric constant for the dielectric thickness and the breakdown voltage for the dielectric thickness. Not only that, but also to provide a firing method of a ceramic capacitor that can improve the yield.
이하 본 발명의 구성 및 작용, 효과를 예시도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.
세라믹콘덴서는 일반적으로 온도특성에 의해 YB, YE, YF, YD듐으로 분류되는 세라믹파우더에 불순물을 첨가하여 반죽한 다음 일정두께로 소결(燒結)시켜 만든 유전체역활을 하는 세라믹판(1) 양측에 Au등의 전극(2)을 부착시키고 이 전극에 리이드선(4)을 연결한 다음 외부의 영향을 받지 않게 에폭시수지와 같은 절연체(3)로 도포된 구조로 되어있다.Ceramic capacitors are generally placed on both sides of a ceramic plate (1) which acts as a dielectric material by kneading by adding impurities to ceramic powders classified into YB, YE, YF, and YD by temperature characteristics, and then sintering them to a certain thickness. The electrode 2, such as Au, is attached to the electrode, and the lead wire 4 is connected to the electrode. The electrode 2 is coated with an
본 발명의 세라믹콘덴서의 소성방법은 높은 유전율을 특성으로 하는 티탄산 바륨(BaTiO3)로 된 주성분에다 BaZrO3, MnCO3, CoCO3, CeO2등과 같은 첨가율을 넣어 반죽하여 일정한 형태의 다이에 넣고 압력을 가해 평탄하게 한 다음 외부에서 온도를 조절할 수 있는 전기로 속에 고정시켜놓고서 제3도와 같이 180℃/hr의 비율로 500-600℃까지 온도를 상승시키고, 이어 유전체파우더의 결합을 위해서 첨가한 물이나 메칠셀룰로우즈, 글리세린등의 바인더제가 가열됨에 따라 생성된 바인더가스를 휘발시키기 위해 500-600℃에서 5-6시간 유지시켜 바인더가스를 휘발시킨 다음 다시 180℃/hr의 비율로 1310-1360℃의 최고온도까지 상승시킨후 최고온도상태, 즉 1310-1360℃상태를 2.5~3시간 유지된다. 그후 -180℃/hr의 비율로 냉각시켜 소성시킨 다음 다이로부터 양호한 세라믹판을 끄집어 내어 표면의 거친 부분을 연마하여 양측에 전극(2)으로 Ag판을 접촉시키고, 에폭시수지로 도포하여 세라믹콘덴서를 제작하였다. 이렇게 제작된 세라믹콘덴서의 특성을 조사한 결과 유전체두께에 대한 유전율의 관계는 제4도의 "본발명"과 같이 나타났으며, 같은 두께의 종래 유전율보다 현저히 증대되었다는 것을 알 수 있었고, 또한 유전체두께에 대한 파괴전압은 제6도의 "본 발명"과 같이 나타났으며, 같은 두께에서 종래의 파괴전압보다 현저히 증대되었다는 것을 알수 있었고, 각 불량요인, 즉 깨짐, 휨, 핀홀, 붙음, 반점등에 대한 공정불량율이 제5도와 같이 현저하게 줄어들어 전체수율을 95%까지 향상시킬 수 있다.In the firing method of the ceramic capacitor of the present invention, the main component is made of barium titanate (BaTiO 3 ) having high dielectric constant, and then kneaded by adding an addition rate such as BaZrO 3 , MnCO 3 , CoCO 3 , CeO 2 , and putting it in a die of a certain shape. Flattened and then fixed in an electric furnace that can control the temperature from the outside, and then the temperature is increased to 500-600 ° C at a rate of 180 ° C / hr as shown in FIG. 3, and then water added for bonding the dielectric powder Or binders such as methyl cellulose and glycerin are heated at 500-600 ° C. for 5-6 hours to volatilize the produced binder gas, followed by volatilizing the binder gas at a rate of 180 ° C./hr and again at 1310-1360. After raising to the maximum temperature of ℃ ℃, the highest temperature state, 1310-1360 ℃ state is maintained for 2.5 to 3 hours. After cooling at a rate of -180 ° C / hr and baking, a good ceramic plate is pulled out from the die, the rough surface of the surface is polished, the Ag plate is brought into contact with the electrode 2 on both sides, and the ceramic capacitor is coated with an epoxy resin. Produced. As a result of investigating the characteristics of the ceramic capacitor fabricated as described above, the relationship of dielectric constant with respect to dielectric thickness was shown as “invention” of FIG. 4, and it was found that the dielectric constant was significantly increased than the conventional dielectric constant of the same thickness. The breakdown voltage was shown as the "invention" of FIG. 6, and it was found that the breakdown voltage was significantly increased than the conventional breakdown voltage at the same thickness. Significantly reduced as shown in Figure 5 can improve the overall yield up to 95%.
상기한 바와같이 본 발명은 소성공정중 예열시 500~600℃에서 5~6시간의 바인더가스 제거기간을 둠으로써 세라믹콘덴서의 유전율과 파괴전압, 절연저항 및 손실계수등이 현저히 향상되므로 수율저하에 의한 재료의 낭비로 가격이 상승되는 것을 방지할 수 있는 효과가 있다.As described above, the present invention provides a binder gas removal period of 5 to 6 hours at 500 to 600 ° C during preheating during the firing process, so that the dielectric constant, breakdown voltage, insulation resistance, and loss coefficient of the ceramic capacitor are significantly improved. There is an effect that can prevent the price rise due to waste of materials.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019860003401A KR890001601B1 (en) | 1986-04-30 | 1986-04-30 | Process of manufacture with ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019860003401A KR890001601B1 (en) | 1986-04-30 | 1986-04-30 | Process of manufacture with ceramic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870010580A KR870010580A (en) | 1987-11-30 |
| KR890001601B1 true KR890001601B1 (en) | 1989-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019860003401A KR890001601B1 (en) | 1986-04-30 | 1986-04-30 | Process of manufacture with ceramic capacitor |
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| Country | Link |
|---|---|
| KR (1) | KR890001601B1 (en) |
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1986
- 1986-04-30 KR KR1019860003401A patent/KR890001601B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR870010580A (en) | 1987-11-30 |
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