JPS5939286B2 - Manufacturing method of raw ceramic sheet - Google Patents
Manufacturing method of raw ceramic sheetInfo
- Publication number
- JPS5939286B2 JPS5939286B2 JP56196082A JP19608281A JPS5939286B2 JP S5939286 B2 JPS5939286 B2 JP S5939286B2 JP 56196082 A JP56196082 A JP 56196082A JP 19608281 A JP19608281 A JP 19608281A JP S5939286 B2 JPS5939286 B2 JP S5939286B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic sheet
- raw ceramic
- roll
- semi
- raw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 title claims description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000010345 tape casting Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 description 8
- 238000005266 casting Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Producing Shaped Articles From Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Inorganic Insulating Materials (AREA)
Description
【発明の詳細な説明】 本発明は生のセラミックシートの製造法に関する。[Detailed description of the invention] The present invention relates to a method for producing green ceramic sheets.
従来、生のセラミックシートはアルミナ、ガラ。Traditionally, raw ceramic sheets are alumina and glass.
ス質などの粒子材料を溶剤、可塑剤、樹脂などとともに
混合した泥漿（以下スリップという）をドクターブレー
ドを使用して可とう性を有するフィルム上に塗工後乾燥
する。いわゆるテープキャスティング法により製造され
ているが、一般にこのような方法で製造された生のセラ
ミックシートを焼成するとフィルムの進行方向とその法
線方向（フィルムに対し直角方向）で収縮率に差を生ず
る。この収縮率に異方性が生ずると基板の寸法精度が悪
くなるのみならず、生のセラミックシート上に回路を形
成しこれを多数枚積層して高い回路密度とした多層セラ
ミック基板を製造した場合、回路の切断などの原因とな
ヤ不都合を生じる。この欠点を補うため乾燥した生のセ
ラミックシートをカレンダー加工して焼成収縮率の異方
性をなくす方法があるが、乾燥した生のセラミックシー
トをカレンダー加工するためにはカレンダーロールに圧
力をかけなければならず、またカレンダーロール表面も
乾燥した生のセラミックシートにより摩耗するなどの欠
点があり、その改善が必要であつた。一方半乾燥の生の
セラミックシートをロール処理して焼成収縮率の異方性
をなくす方法もあるが、キャスティングの幅方向の全て
にわたつて通常の表面が平坦なロールで異方性を解消す
ることは困難であつた。A slurry (hereinafter referred to as slip), which is a mixture of particulate materials such as grains with solvents, plasticizers, resins, etc., is applied onto a flexible film using a doctor blade and then dried. It is manufactured by the so-called tape casting method, but generally when raw ceramic sheets manufactured by this method are fired, there is a difference in shrinkage rate between the film's traveling direction and its normal direction (perpendicular to the film). . Anisotropy in this shrinkage rate not only deteriorates the dimensional accuracy of the substrate, but also when manufacturing a multilayer ceramic substrate with a high circuit density by forming a circuit on a raw ceramic sheet and laminating a large number of sheets. This may cause other inconveniences such as circuit breakage. To compensate for this drawback, there is a method of calendering a dry raw ceramic sheet to eliminate the anisotropy of firing shrinkage rate, but in order to calender a dry raw ceramic sheet, pressure must be applied to the calendar roll. In addition, there is a drawback that the surface of the calender roll is abraded due to the dry raw ceramic sheet, and it is necessary to improve this problem. On the other hand, there is a method to eliminate anisotropy in firing shrinkage rate by rolling a semi-dry raw ceramic sheet, but it is also possible to eliminate anisotropy by using a regular roll with a flat surface across the entire width of the casting. That was difficult.
また生のセラミックシートの厚さが異なる場合には半乾
燥の生のセラミックシートをロール処理する位置を変え
ねばならず装置が煩雑なるなど改善の必要があつた。本
発明はこれらの欠点のないセラミックシートの製造法を
提供することを目的とするものである。Further, if the thickness of the raw ceramic sheet is different, the position at which the semi-dried raw ceramic sheet is rolled must be changed, which makes the apparatus complicated, and there is a need for improvement. The object of the present invention is to provide a method for producing ceramic sheets that does not have these drawbacks.
本発明は可とう性を有するフィルム上にテープキャステ
ィングにより生のセラｓツクシートを製造する方法にお
いて、半乾燥の生のセラミックシートを、まず凹凸な表
面を有するロールで加工し、次いで平坦な表面を有する
ロールで加工して半乾燥の生のセラミックシート表面の
凹凸を除去する生のセラミックシートの製造法に関する
。本発明で使用される可とク性を有するフィルムの材質
及び厚さは制限されず、また製造する生のセラミツクシ
ートの材質なども制限されない。The present invention is a method for producing green ceramic sheets by tape casting on flexible films, in which a semi-dry green ceramic sheet is first processed with a roll having an uneven surface, and then a flat surface is processed. The present invention relates to a method for producing a raw ceramic sheet, which processes the raw ceramic sheet using a roll having the same properties to remove irregularities on the surface of the semi-dried raw ceramic sheet. There are no restrictions on the material or thickness of the flexible film used in the present invention, nor are there any restrictions on the material of the raw ceramic sheet to be produced.
本発明で使用される凹凸な表面を有するロールの材質は
セラミックコーテイングもしくはセラミツクのタイルを
金属ロールに貼ジつけたものが望ましいが、キヤステイ
ング速度とロールの周速度が同一であれば金属であつて
も差Ｌつかえない。半乾燥の生のセラミツクシート表面
の凹凸をなくすために使用する表面が平坦なロールは金
属製で差しつかえない。ロールを押しつける圧力は半乾
燥の生のセラミツクシートの乾燥の影響をうけるが幅１
ＣＴｆＬ当ＶｌＯ９〜５００ｇ程度で十分であり制限は
されない。凹凸な表面のロール突起形状については、突
起の先端が鋭利になつておシ半乾燥の皮膜を破損させる
ものは望ましくないが、一般的には円柱状の突起、半球
状の突起、角柱状の突起などが使用でき、突起の高さは
０．２ｍ１及至２關程度のものが好ましい。以下実施例
により本発明を説明するが本発明はこれによジ拘束され
るものではない。The material of the roll with an uneven surface used in the present invention is preferably ceramic coating or ceramic tiles stuck to a metal roll, but if the casting speed and the peripheral speed of the roll are the same, metal can be used. But I can't get the difference L. The roll with a flat surface used to eliminate unevenness on the surface of a semi-dry raw ceramic sheet may be made of metal. The pressure to press the roll is affected by the drying of the semi-dry raw ceramic sheet, but the width is 1.
Approximately 9 to 500 g of VlO per CTfL is sufficient and is not limited. Regarding the shape of the roll protrusion on the uneven surface, it is not desirable that the tip of the protrusion be sharp and damage the semi-dry film, but in general, cylindrical protrusions, hemispherical protrusions, and prismatic protrusions are recommended. A protrusion or the like can be used, and the height of the protrusion is preferably about 0.2 m1 to 2 m1. The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.
第１表に示す組成物を各々２０倍量配合し、硬質磁器製
６ｔポツトミルに直径２５ｍ１（ψ）アルミナ製ボール
３ｋｇとともに投人し、１００時間混合してスリツプと
した。Each of the compositions shown in Table 1 was blended in 20 times the amount, put into a 6-t pot mill made of hard porcelain together with 3 kg of alumina balls having a diameter of 25 m1 (ψ), and mixed for 100 hours to form a slip.
次に前述のスリツプを厚さ１５０μｍのポリエステルフ
イルム上にドクターブレード法で、ギヤツプ２．１１１
でテープキヤステイングし、４０℃で３時間および６０
℃で３０分乾燥して表面に皮膜が形成された時点で硬質
クロムメツキされた直径１００１１！でかつ表面に直径
１０ｍ７１Ｌ，高さ１１１の半球状の凸起を５．７中間
隔でとｖつけたロールを幅１ｃｍ当？）５０９の荷重で
押しつけ半乾燥の生のセラミツクシート表面に凹凸を形
成し、引き続き直径６０ｍ１で表面の平坦な硬質クロム
メツキされたロールを幅１ＣｆＬ当シ１００９の荷重で
半乾燥の生のセラミツクシート表面を平坦にした。Next, the aforementioned slip was placed on a 150 μm thick polyester film using a doctor blade method, with a gap of 2.111 mm.
tape casting at 40°C for 3 hours and 60°C.
After drying at ℃ for 30 minutes and forming a film on the surface, it is hard chrome plated with a diameter of 10011! A roll with a diameter of 10 m, 71 L and a height of 111 mm and a hemispherical protrusion on the surface at 5.7 medium intervals, with a width of 1 cm? ) The surface of the semi-dry raw ceramic sheet was pressed with a load of 509 to form irregularities, and then a hard chrome-plated roll with a diameter of 60 m1 and a flat surface was pressed with a width of 1 CfL and a load of 1009 to the surface of the semi-dry raw ceramic sheet. flattened.
その後７０℃で３０分、８０℃で３０分および１００で
３０分の条件で乾燥させて厚さ１ＷＺ１の生のセラミツ
クシートとし、該生のセラミツクシートをポリエステル
フイルムからはく離したのちパンチングにより５０１１
ｔｍ角に打ち抜いた。次に前記打ち抜いた５０中角の生
のセラミツクシートを室温から３００℃まで２時間で昇
温し、３０分保持したのち３『Ｃ／時間で１３００℃ま
で昇温し、さらに５０℃／時間で１６００℃まで昇温し
、３０分保持して焼成セラミツク基板とした。Thereafter, it was dried at 70°C for 30 minutes, 80°C for 30 minutes, and 100°C for 30 minutes to obtain a raw ceramic sheet with a thickness of 1WZ1. After peeling the raw ceramic sheet from the polyester film, it was punched to form a 5011
Punched into tm square. Next, the temperature of the punched 50 medium square raw ceramic sheet was raised from room temperature to 300°C in 2 hours, held for 30 minutes, then heated to 1300°C at 3°C/hour, and further heated at 50°C/hour. The temperature was raised to 1600° C. and held for 30 minutes to obtain a fired ceramic substrate.
このセラミツク基板の焼成収縮率は２０枚の平均でキヤ
ステイング方向１４．１％，法線方向１４．１％で差は
なく各点における焼成収縮率の差も０．１％以下であつ
た。比較例
実施例と同じスリツプを使用し、２回のロール処理のみ
除いて実施例と同条件でテープキャスタイックし、生の
セラミツクシートとした。The average firing shrinkage of 20 ceramic substrates was 14.1% in the casting direction and 14.1% in the normal direction, with no difference, and the difference in firing shrinkage at each point was less than 0.1%. Comparative Example Using the same slip as in the example, tape casting was performed under the same conditions as in the example except for rolling twice, to obtain a green ceramic sheet.
これを実施例と同じ大きさに打ち抜き以下実施例と同条
件で焼成してセラミツク基板とし、焼成収縮率を測定し
た。焼成収縮率は２０枚の平均でキヤステイング方向１
４．３％，法線方向１３．８％と０．５％の差があり各
点における焼成収縮率の差は０．３〜０．６％みられた
。This was punched out to the same size as in the example and then fired under the same conditions as in the example to obtain a ceramic substrate, and the firing shrinkage rate was measured. The firing shrinkage rate is the average of 20 sheets in the casting direction 1
There was a difference of 0.5% between 4.3% and 13.8% in the normal direction, and the difference in firing shrinkage at each point was 0.3 to 0.6%.
本発明は凹凸な表面を有するロールで半乾燥の生のセラ
ミツクシートの表面に凹凸を形成し、この過程でキヤス
テイングにより配向させられていたセラミツク原料の粒
子はランダムな方向を向き、次いでこの凹凸を平坦な表
面を有するロールで加工して平坦化するのでさらにセラ
ミツク原料粒子の配向は修正され結果として焼成収縮率
の異方性がほとんど生じない生のセラミツクシートを製
造することができる。In the present invention, unevenness is formed on the surface of a semi-dry raw ceramic sheet using a roll having an uneven surface, and during this process, particles of ceramic raw material that had been oriented by casting are oriented in random directions, and then the unevenness is Since the material is flattened by processing with a roll having a flat surface, the orientation of the ceramic raw material particles is further corrected, and as a result, a green ceramic sheet with almost no anisotropy in firing shrinkage rate can be produced.
Claims (1)
グにより生のセラミックシートを製造する方法において
、半乾燥の生のセラミックシートを、まず凹凸な表面を
有するロールで加工し、次いで平坦な表面を有するロー
ルで加工して半乾燥の生のセラミックシート表面の凹凸
を除去することを特徴とする生のセラミックシートの製
造法。1. In a method of producing a green ceramic sheet by tape casting on a flexible film, a semi-dry green ceramic sheet is first processed with a roll having an uneven surface, and then a roll with a flat surface is processed. A method for producing a raw ceramic sheet, characterized by processing the raw ceramic sheet to remove irregularities on the surface of the semi-dry raw ceramic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56196082A JPS5939286B2 (en) | 1981-12-04 | 1981-12-04 | Manufacturing method of raw ceramic sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56196082A JPS5939286B2 (en) | 1981-12-04 | 1981-12-04 | Manufacturing method of raw ceramic sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5896508A JPS5896508A (en) | 1983-06-08 |
| JPS5939286B2 true JPS5939286B2 (en) | 1984-09-21 |
Family
ID=16351899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56196082A Expired JPS5939286B2 (en) | 1981-12-04 | 1981-12-04 | Manufacturing method of raw ceramic sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939286B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160809A (en) * | 2018-08-29 | 2019-01-08 | 厦门朝瓷科技有限公司 | A kind of submicrometer structure ultrathin alumina ceramic substrate and preparation method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145970A (en) * | 1983-12-29 | 1985-08-01 | 株式会社陶研産業 | Manufacture of ceramic thin blade |
| JPH0729850B2 (en) * | 1991-11-18 | 1995-04-05 | 日本ピラー工業株式会社 | Ceramic member of hydrodynamic bearing having a plurality of adjacent concave grooves on the surface and method of manufacturing the same |
| JPH07187803A (en) * | 1993-12-27 | 1995-07-25 | Nec Corp | Production of green sheet |
| JP2009126095A (en) * | 2007-11-26 | 2009-06-11 | Nippon Shokubai Co Ltd | Manufacturing method of surface-roughened ceramic green sheet |
| CN110862260B (en) * | 2018-08-28 | 2021-03-26 | 比亚迪股份有限公司 | Electronic product casing and preparation method thereof and mobile phone back cover |
| CN108947504A (en) * | 2018-08-29 | 2018-12-07 | 厦门朝瓷科技有限公司 | Submicrometer structure ultrathin alumina ceramic substrate and preparation method |
-
1981
- 1981-12-04 JP JP56196082A patent/JPS5939286B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160809A (en) * | 2018-08-29 | 2019-01-08 | 厦门朝瓷科技有限公司 | A kind of submicrometer structure ultrathin alumina ceramic substrate and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5896508A (en) | 1983-06-08 |
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