JPH0425473A - Thermal printing head and its manufacture - Google Patents

Thermal printing head and its manufacture

Info

Publication number
JPH0425473A
JPH0425473A JP13078290A JP13078290A JPH0425473A JP H0425473 A JPH0425473 A JP H0425473A JP 13078290 A JP13078290 A JP 13078290A JP 13078290 A JP13078290 A JP 13078290A JP H0425473 A JPH0425473 A JP H0425473A
Authority
JP
Japan
Prior art keywords
protective film
paper
print head
electrode layer
printing head
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.)
Pending
Application number
JP13078290A
Other languages
Japanese (ja)
Inventor
Yoshikatsu Yamamoto
好克 山本
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP13078290A priority Critical patent/JPH0425473A/en
Publication of JPH0425473A publication Critical patent/JPH0425473A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To enable high printing quality thermal printing head to be formed at a low cost by a method wherein a part, which comes in contact with paper via an ink ribbon, of a protective film is made to be a smooth surface. CONSTITUTION:A glazed glass 2 is formed on a heat resistant insulating substrate 1 and further a heating element layer 3, an individual electrode layer 4, a common electrode layer 5, and a protective film 6 are formed on the glazed glass 2. The protective film 6 is ground under a state wherein a thermal printing head 9 is fitted to a printer, and a part coming in contact with paper 11 via an ink ribbon 10 has been made smooth. For a grinding method, a wrapping film 7 of 3mm in a substrate thickness 3 and 0.3mum in grain size of aluminum oxide is set to the printer 8 to which the thermal printing head 9 is attached like printing paper. Then, the thermal printing head 9 is made down onto this wrapping film 7 in the same way as in a printing state, and it is moved for 1-2 line content under a non electrified state. Thereby, the part 6a coming in contact with the paper 11 via the ink ribbon 10 of the protective film 6 is ground to make a smooth surface.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、サーマルプリンタや、ファクシミリに用いる
サーマルプリントヘッド及びその製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal print head used in a thermal printer or facsimile, and a method for manufacturing the same.

[従来の技術] 薄膜サーマルプリントヘッドは、第3図に示したように
耐熱性絶縁基板l上にグレーズガラス2を配し、その上
に発熱体層3、個別電極層4、共通電極層5を形成し、
さらにその上を保護膜6で覆うという構造をしている。
[Prior Art] As shown in FIG. 3, a thin film thermal print head has a glaze glass 2 arranged on a heat-resistant insulating substrate 1, and a heating element layer 3, an individual electrode layer 4, and a common electrode layer 5 on top of the glaze glass 2. form,
Furthermore, it has a structure in which a protective film 6 is covered thereon.

従来のサーマルプリントヘッドは、保護膜6に個別電極
層4の厚み分の段差Gが生じている。又、この一般にエ
アギャップと呼ばれる段差Gを解消するために保護膜6
をエツチングして段差を無くした第4図に示すようなメ
サ構造も考案されている。
In the conventional thermal print head, a step G corresponding to the thickness of the individual electrode layer 4 is formed in the protective film 6 . In addition, in order to eliminate this level difference G, which is generally called an air gap, a protective film 6 is provided.
A mesa structure as shown in FIG. 4, in which the step is eliminated by etching, has also been devised.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

このような従来の構造では、エアギャップによるエネル
ギー損失が大きい上、印字品質(印字の切れ)にも悪影
響を及ぼしていた。又、エツチングによるメサ構造や、
保護膜段差の解消にはフォトリソ工程が入るため大幅な
工程増加となり、コストアップの原因となってしまう。
In such a conventional structure, not only the energy loss due to the air gap is large, but also the printing quality (cutting of printing) is adversely affected. Also, mesa structure by etching,
A photolithography process is required to eliminate the step difference in the protective film, resulting in a significant increase in process steps and resulting in an increase in costs.

本発明はこのような従来の問題点を解消し、安価で高印
字品質なサーマルプリントヘッドを提供することを目的
とする。
It is an object of the present invention to solve these conventional problems and provide a thermal print head that is inexpensive and has high print quality.

[課題を解決するための手段] 本発明のサーマルプリントヘッドは、耐熱性絶縁基板上
にグレーズガラスを配し、その上に発熱体層、共通電極
層、個別電極層、保護膜を設けてなるサーマルプリント
ヘッドにおいて、前記保護膜の、インクリボンを介して
紙に当接する部分を平滑面としたことを特徴とする。
[Means for Solving the Problems] The thermal print head of the present invention includes glazed glass arranged on a heat-resistant insulating substrate, and a heating element layer, a common electrode layer, an individual electrode layer, and a protective film provided thereon. The thermal print head is characterized in that the portion of the protective film that contacts the paper via the ink ribbon has a smooth surface.

また、本発明の製造方法は、耐熱性絶縁基板上にグレー
ズガラスを配し、その上に発熱体層、共通電極層、個別
電極層、及び保護膜を設けてなるサーマルプリントヘッ
ドをプリンタに取り付けると共に、ラッピングフィルム
を印字紙と同様にプリンタにセットし、印字時と同様に
サーマルプリントヘッドをラッピングフィルムに対して
移動させることにより前記保護膜の表面を研磨し、保護
膜のインクリボンを介して紙に当接する部分を平滑面と
することを特徴とする。
Further, in the manufacturing method of the present invention, a thermal print head in which a glaze glass is arranged on a heat-resistant insulating substrate, and a heating element layer, a common electrode layer, an individual electrode layer, and a protective film are provided thereon is attached to a printer. At the same time, the wrapping film is set in the printer in the same way as the printing paper, and the surface of the protective film is polished by moving the thermal print head relative to the wrapping film in the same way as when printing. It is characterized by having a smooth surface on the part that comes into contact with the paper.

[実 施 例] 第1図に本発明に於けるサーマルプリントヘッドの一実
施例の発熱体付近の構造断面図を示す。
[Embodiment] FIG. 1 shows a structural sectional view of the vicinity of a heating element of an embodiment of a thermal print head according to the present invention.

耐熱性絶縁基板l上にグレーズガラス2が形成され、さ
らにグレーズガラス2上に発熱体層3、個別電極層4、
共通電極層5、保護膜6が形成されている。保護膜6は
後述するように、サーマルプリントヘッド9をプリンタ
に取り付けた状態で研磨されてインクリボン10を介し
て紙11に当接する部分6aが平滑面となっている、し
たがって、第3図に示したようなエアギャップは解消さ
れている。研磨方法は、第2図に示した方法で行う。
A glaze glass 2 is formed on a heat-resistant insulating substrate l, and a heating element layer 3, an individual electrode layer 4,
A common electrode layer 5 and a protective film 6 are formed. As will be described later, the protective film 6 is polished with the thermal print head 9 attached to the printer so that the portion 6a that contacts the paper 11 via the ink ribbon 10 has a smooth surface. The air gap shown has been eliminated. The polishing method is as shown in FIG.

まず、サーマルプリントヘッド9を取り付けたプリンタ
8に基材厚み3ミリ、酸化アルミニウム粒度03μmの
ラッピングフィルム7を印字紙のようにセットする。次
に、サーマルプリントヘッド9を印字状態と同様にこの
ラッピングフィルム7上にダウンさせ、通電しない状態
で1〜2ライン分移動させる。これにより、保護1!6
のインクリボン10を介して紙11に当接する部分6a
が研磨されて平滑面となる。
First, a wrapping film 7 having a base material thickness of 3 mm and an aluminum oxide particle size of 03 μm is set in the printer 8 equipped with the thermal print head 9 like printing paper. Next, the thermal print head 9 is lowered onto the wrapping film 7 in the same manner as in the printing state, and is moved by one to two lines without being energized. This gives protection 1!6
A portion 6a that contacts the paper 11 via the ink ribbon 10 of
is polished to a smooth surface.

本実施例の方法では、プリンタ8の組立工程の中の最終
印字検査工程の前に行うことができ、はとんど工数増加
、コストアップにならずに、エアギャップを解消するこ
とができる。
The method of this embodiment can be performed before the final print inspection step in the assembly process of the printer 8, and the air gap can be eliminated without increasing the number of man-hours or increasing costs.

尚、ここで示した例はシリアルプリンタに関してである
が、ラインプリンタにおいても同様であることは言うま
でもない、又、ラッピングフィルムの基材厚み、粒度は
これに限定されるものではない。
Although the example shown here relates to a serial printer, it goes without saying that the same applies to a line printer, and the base material thickness and particle size of the wrapping film are not limited to these.

〔発明の効果1 本発明によって、保護膜の段差を無くすことにより、発
熱エネルギーを効率よく感熱紙やインクツポンに伝える
ことができ、より低エネルギ・−で印字品質の良いサー
マルプリントヘッドを安価に製作することができる。
[Effect of the invention 1] According to the present invention, by eliminating the step difference in the protective film, heat generated energy can be efficiently transmitted to the thermal paper or ink pad, and a thermal print head with lower energy consumption and better printing quality can be produced at a lower cost. can do.

更に、保護膜上にできる異物による突起等も同時に取り
除くことができ、印字における横スジ汚れの発生を抑え
ることができる。
Furthermore, protrusions caused by foreign matter formed on the protective film can be removed at the same time, and the occurrence of horizontal streaks in printing can be suppressed.

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

第1図は本発明に於けるサーマルプリントヘッドの一実
施例の発熱体付近の断面図。第2図は本発明の製造方法
の一実施例を示した図である。 第3図、第4図は従来のサーマルプリントヘッドの発熱
体付近の断面図である。 耐熱絶縁性基板 グレーズガラス 発熱体層 個別電極層 共通電極層 ・保護膜 ・ラッピングフィルム プリンタ ・サーマルプリントヘッド ・インクリボン ・紙 出願人 セイコーエプソン株式会社 代理人 弁理士 鈴 木 喜三部(化1名)第1 図 第2図
FIG. 1 is a sectional view of the vicinity of a heating element of an embodiment of a thermal print head according to the present invention. FIG. 2 is a diagram showing an embodiment of the manufacturing method of the present invention. FIGS. 3 and 4 are cross-sectional views of the vicinity of the heating element of a conventional thermal print head. Heat-resistant insulating substrate Glaze glass heating element layer Individual electrode layer Common electrode layer, protective film, wrapping film Printer, thermal print head, ink ribbon, paper Applicant Seiko Epson Corporation Representative Patent attorney Kizobe Suzuki (1 person) ) Figure 1 Figure 2

Claims (2)

【特許請求の範囲】[Claims] (1)耐熱性絶縁基板上にグレーズガラスを配し、その
上に発熱体層、共通電極層、個別電極層、及び保護膜を
設けてなるサーマルプリントヘッドにおいて、前記保護
膜の、インクリボンを介して紙に当接する部分を平滑面
としたことを特徴とするサーマルプリントヘッド。
(1) In a thermal print head in which a glaze glass is arranged on a heat-resistant insulating substrate, and a heating element layer, a common electrode layer, an individual electrode layer, and a protective film are provided thereon, the ink ribbon of the protective film is A thermal print head characterized by having a smooth surface on the part that contacts the paper.
(2)耐熱性絶縁基板上にグレーズガラスを配し、その
上に発熱体層、共通電極層、個別電極層、及び保護膜を
設けてなるサーマルプリントヘッドをプリンタに取り付
けると共に、ラッピングフィルムを印字紙と同様にプリ
ンタにセットし、印字時と同様にサーマルプリントヘッ
ドをラッピングフィルムに対して移動させることにより
前記保護膜の表面を研磨し保護膜のインクリボンを介し
て紙に当接する部分を平滑面とすることを特徴とするサ
ーマルプリントヘッドの製造方法。
(2) A thermal print head consisting of a heat-resistant insulating substrate with glazed glass on which a heating element layer, a common electrode layer, an individual electrode layer, and a protective film are provided is attached to the printer, and a wrapping film is printed. The surface of the protective film is polished by setting it in the printer in the same way as paper, and moving the thermal print head relative to the wrapping film in the same way as when printing, smoothing the part of the protective film that contacts the paper via the ink ribbon. A method for manufacturing a thermal print head, characterized in that the print head has a flat surface.
JP13078290A 1990-05-21 1990-05-21 Thermal printing head and its manufacture Pending JPH0425473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13078290A JPH0425473A (en) 1990-05-21 1990-05-21 Thermal printing head and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13078290A JPH0425473A (en) 1990-05-21 1990-05-21 Thermal printing head and its manufacture

Publications (1)

Publication Number Publication Date
JPH0425473A true JPH0425473A (en) 1992-01-29

Family

ID=15042549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13078290A Pending JPH0425473A (en) 1990-05-21 1990-05-21 Thermal printing head and its manufacture

Country Status (1)

Country Link
JP (1) JPH0425473A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6441840B1 (en) * 2000-06-19 2002-08-27 Rohm Co., Ltd. Thick-film thermal printhead with improved paper transfer properties

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6441840B1 (en) * 2000-06-19 2002-08-27 Rohm Co., Ltd. Thick-film thermal printhead with improved paper transfer properties

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