JPS63256462A - Thermal head - Google Patents

Thermal head

Info

Publication number
JPS63256462A
JPS63256462A JP9173387A JP9173387A JPS63256462A JP S63256462 A JPS63256462 A JP S63256462A JP 9173387 A JP9173387 A JP 9173387A JP 9173387 A JP9173387 A JP 9173387A JP S63256462 A JPS63256462 A JP S63256462A
Authority
JP
Japan
Prior art keywords
glaze
substrate
projections
paper
thermal
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.)
Granted
Application number
JP9173387A
Other languages
Japanese (ja)
Other versions
JPH0615243B2 (en
Inventor
Hiroaki Onishi
弘朗 大西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP62091733A priority Critical patent/JPH0615243B2/en
Publication of JPS63256462A publication Critical patent/JPS63256462A/en
Publication of JPH0615243B2 publication Critical patent/JPH0615243B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/335Structure of thermal heads

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To enable general paper of a large surface roughness to be used by improving contact with a heat sensitive paper and a thermal transfer ribbon by a method wherein two rows of adjacent parallel projections are formed on a substrate, and a glaze is printed to be baked between the projections. CONSTITUTION:When for instance, line grooves 2, 3 are formed by preliminarily scanning a substrate 1 by irradiation with laser beam, swollen up parts 2a, 2b, 3a, 3d are formed at both ends of th grooves. By utilizing projections of the swollen up part 2a, 3a, a glaze is screen printed between those two projections, and backed to form a glaze layer 4. The glaze 4 does not expand over the surface of the substrate 1 in baking because of the projections 2a, 3a, and curvature at the crest of the glaze becomes large. A resistor 5 and feeding conductors 6, 7 are, in a pattern, formed by sputtering and etching, and an insulating projective film 8 is spread on the surface thereof. A heating part formed on the glaze surface of a large curvature comes in sure contact with a thermal transfer ribbon and a paper or a thermal sensitive paper; and printing quality is raised.

Description

【発明の詳細な説明】 (a)産業上の利用分野 この発明は、感熱記録装置に用いられるサーマルヘッド
に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a thermal head used in a thermal recording device.

(b)従来の技術 サーマルヘッドに形成された抵抗体に通電してジュール
熱を発生させ、この熱を感熱紙あるいは熱転写リボンに
伝達することにより記録を行う感熱記録装置においては
、サーマルヘッドの発熱部と感熱紙あるいは熱転写リボ
ンとの接触状態が印字画質に大きな影響を及ぼす、また
、この接触状態は熱の伝達効率にも影響を及ぼしサーマ
ルヘッドの寿命を支配する要因でもある。このため、従
来よりサーマルヘッドの発熱部の形状を工夫し接触状態
を改良するようにしている。
(b) Conventional technology In a thermal recording device that performs recording by energizing a resistor formed in a thermal head to generate Joule heat and transmitting this heat to thermal paper or a thermal transfer ribbon, the thermal head generates heat. The contact condition between the head and the thermal paper or thermal transfer ribbon has a great effect on the quality of the printed image, and this contact condition also affects the heat transfer efficiency and is a factor that controls the lifespan of the thermal head. For this reason, conventional efforts have been made to improve the contact condition by devising the shape of the heat generating portion of the thermal head.

第5図は従来のサーマルヘッドの構造を表す部分断面図
である0図においてlは絶縁性の基板、4はグレーズ層
、5は抵抗体層の発熱部を表し、6.7はこの発熱部へ
の給電導体、8は発熱部の酸化および摩耗を防止する絶
縁性の保護膜をそれぞれ表している。このように基板上
に部分的にグレーズ層からなる突起部を形成し、その表
面に発熱部を形成することによって感熱紙あるいは熱転
写リボンとの接触状態を改善している。
FIG. 5 is a partial cross-sectional view showing the structure of a conventional thermal head. In FIG. The power supply conductor 8 represents an insulating protective film that prevents oxidation and wear of the heat generating portion. In this way, by forming protrusions made of a glaze layer partially on the substrate and forming heat generating parts on the surface thereof, the contact condition with thermal paper or thermal transfer ribbon is improved.

(C1発明が解決しようとする問題点 ところが、このような従来のサーマルヘッドにおいても
、感熱紙や熱転写用の用紙以外の普通の用紙に感熱記録
を行う場合、用紙表面の表面荒さが問題となる。第6図
は従来のサーマルヘッドと熱転写リボンおよび用紙との
接力虫状態を表す図であり、同図においてIは熱転写リ
ボン、Pは用紙を表している。図に示すように保護膜8
の先端部(A)に凹部が存在するため、熱転写リボンお
よび用紙に対して発熱部が接触しない場合があった。こ
のような不都合を解消するためには、基板上に形成する
グレーズを高くし、その曲率を大きくすることが必要で
あるが、焼成時にグレーズが基板表面上に広がるという
問題があった。たとえばAIZO+セラミック基板に対
してグレーズをスクリーン印刷し焼成した場合、グレー
ズ層の厚みが55μmであれば幅が700μm以上、厚
さが40μmであれば幅が600μm以上という具合に
グレーズの形成される幅が拡がり、グレーズ頂部の曲率
を大きくすることができなかった。
(C1 Problem to be solved by the invention) However, even with such a conventional thermal head, when performing thermal recording on ordinary paper other than thermal paper or thermal transfer paper, surface roughness of the paper surface becomes a problem. 6 is a diagram showing the state of contact between a conventional thermal head, a thermal transfer ribbon, and paper. In the figure, I represents the thermal transfer ribbon and P represents the paper. As shown in the figure, the protective film 8
Since the concave portion was present at the leading end (A) of the sheet, the heat generating portion did not come into contact with the thermal transfer ribbon and the paper in some cases. In order to eliminate such inconveniences, it is necessary to increase the height of the glaze formed on the substrate and increase its curvature, but there is a problem in that the glaze spreads over the substrate surface during firing. For example, when a glaze is screen printed on an AIZO+ceramic substrate and fired, the width of the glaze layer is 700 μm or more if the thickness of the glaze layer is 55 μm, and 600 μm or more if the thickness is 40 μm. spread, making it impossible to increase the curvature of the top of the glaze.

この発明の目的は感熱紙あるいは熱転写リボンとの接触
状態を良好にして、表面荒さの大きな用紙に対しても印
字品位の高いrF!!、熱記録を可能としたサーマルヘ
ッドを提供することにある。
The purpose of this invention is to improve the contact condition with thermal paper or thermal transfer ribbon, and to achieve high quality printing even on paper with a large surface roughness. ! The object of the present invention is to provide a thermal head that enables thermal recording.

(d1問題点を解決するための手段 この発明のサーマルヘッドは、基板上にグレーズ層が形
成され、このグレーズ層上に発熱部が形成されたサーマ
ルヘッドにおいて、 上記基板上に2列の近接する平行な突起部を形成し、こ
の2列の突起部間に上記グレーズを印刷・焼成したこと
を特徴としている。
(Means for Solving Problem d1) The thermal head of the present invention has a glaze layer formed on a substrate, and a heat generating part formed on this glaze layer. It is characterized in that parallel protrusions are formed, and the glaze is printed and fired between the two rows of protrusions.

(e)作用 C(7) 発明のサーマルヘッドにおいては、基板上に
2列の近接する平行な突起部を形成し、この2列の突起
部間にグレーズを印刷・焼成することにより、焼成途中
でグレーズの粘度が低下しても2つの突起部間でグレー
ズが保持されるため、グレーズが基板の表面上に広がる
ことがなく、グレーズ頂部の曲率を大きくすることがで
きる。
(e) Effect C(7) In the thermal head of the invention, two rows of adjacent parallel protrusions are formed on the substrate, and a glaze is printed and fired between the two rows of protrusions, so that the glaze is heated during firing. Even if the viscosity of the glaze decreases, the glaze is held between the two protrusions, so the glaze does not spread over the surface of the substrate, and the curvature of the top of the glaze can be increased.

(f)実施例 第1図はこの発明の実施例であるサーマルヘッドの構造
を表す部分断面図である0図において1はアルミナセラ
ミクスなどの絶縁性の基板を表し、この基板1に対して
グレーズ層4が形成されるが、基板1に予めレーザービ
ームの照射および走査により条溝が形成される0図にお
いて2.3はそれぞれV字型に形成された条溝を表して
いる。
(f) Embodiment FIG. 1 is a partial cross-sectional view showing the structure of a thermal head according to an embodiment of the present invention. In FIG. When the layer 4 is formed, grooves are formed in advance on the substrate 1 by irradiation and scanning with a laser beam. In FIG.

レーザービームにより条溝を形成した場合、溝の両端部
分に盛り上がり部2a、2b、3a、3bが形成される
が、この実施例では盛り上がり2aと3aの突起部を利
用してこの2つの突起部間にグレーズをスクリーン印刷
し、焼成することによってグレーズ層4を形成している
。このように2つの突起部2a、3aの存在によりグレ
ーズ4が焼成時に基板lの表面に広がることがな(、グ
レーズ頂部の曲率を高めている。グレーズ層4の表面に
は従来のサーマルヘッドの場合と同様に抵抗体5.給電
導体6.7をスパッタリングおよびエツチングによりパ
ターン形成され、さらにその表面に絶縁性の保護膜8が
被覆されている。
When a groove is formed by a laser beam, raised portions 2a, 2b, 3a, and 3b are formed at both ends of the groove, but in this embodiment, the raised portions 2a and 3a are used to form these two raised portions. A glaze layer 4 is formed by screen printing a glaze in between and baking it. The presence of the two protrusions 2a and 3a prevents the glaze 4 from spreading over the surface of the substrate l during firing (the curvature of the top of the glaze is increased). Similarly to the case, the resistor 5 and the power supply conductor 6.7 are patterned by sputtering and etching, and their surfaces are further coated with an insulating protective film 8.

第2図は上記サーマルヘッドと熱転写リボンおよび用紙
との接触状態を表す図であり、図示の通り熱転写リボン
■と用紙PはAの箇所でサーマルヘッドの発熱部に確実
に接触する。
FIG. 2 is a diagram showing the state of contact between the thermal head, the thermal transfer ribbon, and the paper. As shown in the figure, the thermal transfer ribbon (2) and the paper P reliably contact the heat generating portion of the thermal head at the point A.

なお、この実施例によれば、発熱部面下のグレーズの体
積を大きくして熱容量を大きくすることによって、低速
低消費電力化できるため、たとえば電池駆動型の装置に
も適用可能である。
According to this embodiment, by increasing the volume of the glaze under the surface of the heat generating part to increase the heat capacity, it is possible to achieve low speed and low power consumption, and therefore it is applicable to, for example, battery-driven devices.

上記実施例はレーザービーム加工により2本の条溝を形
成した例であったが、たとえば第3図に示すように基板
1に対して1本の条溝2を形成して、その溝の両側に形
成される盛り上がり部2a、2bを利用してこの間にグ
レーズ4を形成することも可能である。さらにレーザー
ビームを用いなくとも突起部を形成することは可能であ
り、例えばセラミック基板の焼成前に、第4図に示すよ
うに基板1の表面を治具により切削加工し、2列の近接
する平行な突起部10.1)を形成し、この2列の突起
部間にグレーズ4を印刷・焼成することによって曲率の
大きなグレーズ層を形成することができる。
In the above embodiment, two grooves were formed by laser beam processing, but for example, as shown in FIG. 3, one groove 2 is formed on the substrate 1, and both sides of the groove are It is also possible to form the glaze 4 between the raised portions 2a and 2b formed between the two. Furthermore, it is possible to form protrusions without using a laser beam; for example, before firing the ceramic substrate, the surface of the substrate 1 is cut with a jig as shown in FIG. A glaze layer with a large curvature can be formed by forming parallel protrusions 10.1) and printing and firing the glaze 4 between the two rows of protrusions.

(幻発明の効果 以上のようにこの発明によれば、曲率の大きなグレーズ
を基板上に部分的に形成することができるため、このグ
レーズ表面に形成された発熱部が熱転写リボンと用紙あ
るいは怒熱紙に対して確実に接触して、印字品位を高め
ることができる。また、表面荒さの比較的大きな一般の
用紙を用いることも可能となる。
(As described above, according to this invention, a glaze with a large curvature can be partially formed on the substrate, so that the heat generating part formed on the surface of the glaze can be connected to the thermal transfer ribbon, paper, or The printing quality can be improved by making reliable contact with the paper.Also, it is possible to use ordinary paper with a relatively rough surface.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の実施例であるサーマルヘッドの構造
を表す部分断面図、第2図は同す−マルヘンドと熱転写
リボンおよび用紙との接触状態を表す図、第3図と第4
図は他の実施例に係るサーマルヘッドの製造途中の構造
を表す断面図、′第5図は従来のサーマルヘッドの構造
を表す部分断面図、第6図は従来のサーマルヘッドと熱
転写リボンおよび用紙との接触状態を表す図である。 l−基板、2.3−条溝、 2a、3a−突起部、4−グレーズ層、5−抵抗体層、
6.7−給電導体、 8−保iI膜。 @1図 t42閉
FIG. 1 is a partial cross-sectional view showing the structure of a thermal head according to an embodiment of the present invention, FIG.
The figure is a cross-sectional view showing the structure of a thermal head in the process of being manufactured according to another embodiment, Figure 5 is a partial cross-sectional view showing the structure of a conventional thermal head, and Figure 6 is a conventional thermal head, thermal transfer ribbon, and paper. It is a figure showing a contact state with. l - substrate, 2.3 - groove, 2a, 3a - protrusion, 4 - glaze layer, 5 - resistor layer,
6.7-Feeding conductor, 8-IiI film. @1 figure t42 closed

Claims (1)

【特許請求の範囲】[Claims] (1)基板上にグレーズ層が形成され、このグレーズ層
上に発熱部が形成されたサーマルヘッドにおいて、 上記基板上に2列の近接する平行な突起部を形成し、こ
の2列の突起部間に上記グレーズを印刷・焼成したこと
を特徴とするサーマルヘッド。
(1) In a thermal head in which a glaze layer is formed on a substrate and a heat generating part is formed on this glaze layer, two rows of adjacent parallel protrusions are formed on the substrate, and these two rows of protrusions A thermal head characterized in that the above glaze is printed and fired in between.
JP62091733A 1987-04-14 1987-04-14 Thermal head Expired - Fee Related JPH0615243B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62091733A JPH0615243B2 (en) 1987-04-14 1987-04-14 Thermal head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62091733A JPH0615243B2 (en) 1987-04-14 1987-04-14 Thermal head

Publications (2)

Publication Number Publication Date
JPS63256462A true JPS63256462A (en) 1988-10-24
JPH0615243B2 JPH0615243B2 (en) 1994-03-02

Family

ID=14034715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62091733A Expired - Fee Related JPH0615243B2 (en) 1987-04-14 1987-04-14 Thermal head

Country Status (1)

Country Link
JP (1) JPH0615243B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023214514A1 (en) * 2022-05-02 2023-11-09 ローム株式会社 Thermal print head, method for manufacturing thermal print head, and thermal printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112805798A (en) 2018-08-10 2021-05-14 阿维科斯公司 Solid electrolytic capacitor containing polyaniline

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394736U (en) * 1986-12-10 1988-06-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6394736U (en) * 1986-12-10 1988-06-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023214514A1 (en) * 2022-05-02 2023-11-09 ローム株式会社 Thermal print head, method for manufacturing thermal print head, and thermal printer

Also Published As

Publication number Publication date
JPH0615243B2 (en) 1994-03-02

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