JPS59114076A - Thermal head and manufacture thereof - Google Patents
Thermal head and manufacture thereofInfo
- Publication number
- JPS59114076A JPS59114076A JP57222937A JP22293782A JPS59114076A JP S59114076 A JPS59114076 A JP S59114076A JP 57222937 A JP57222937 A JP 57222937A JP 22293782 A JP22293782 A JP 22293782A JP S59114076 A JPS59114076 A JP S59114076A
- Authority
- JP
- Japan
- Prior art keywords
- projection
- substrate
- thermal head
- alumina
- paste
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters 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
- B41J2/32—Typewriters 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
- B41J2/335—Structure of thermal heads
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は感熱紙を加熱する感熱プリンタのサーマルヘッ
ド及びその製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thermal head for a thermal printer that heats thermal paper, and a method for manufacturing the same.
（従′来例の構成とその問題点）
従来よシ使用されているサーマルヘッドの構造は大別す
ると発熱体が突起の上にあるものと、平板の上にあるも
のの２種類に分けることができる。(Conventional configurations and their problems) The structures of conventional thermal heads can be roughly divided into two types: those in which the heating element is located on a protrusion, and those in which the heating element is located on a flat plate. can.
平板の上に発熱体が形成されたものは製造工法的に精密
なパターンが出し易いのでラインプリンタに用いられて
いる。しかし感熱紙との接触が悪いので、感熱紙を裏か
ら支持するゴムをローラにして動かす等、機械部分を複
雑にしなければならず、安価に製造出来ないという欠点
がある。A flat plate with a heating element formed on it is used in line printers because it is easy to produce precise patterns in terms of manufacturing method. However, since the contact with the thermal paper is poor, the mechanical parts must be complicated, such as using a roller to move the rubber that supports the thermal paper from the back, and this has the disadvantage that it cannot be manufactured at a low cost.
突起上に発熱体が形成されたものは、感熱紙との接触が
良いので構造も簡単で済み、駆動電力も少いのでシリア
ル形プリンタに多く用いられている。しかし、所望の突
起を安価に作成するのが難しく、現在は発熱印字品質の
悪いものになっている。Those in which a heating element is formed on the protrusion have good contact with thermal paper, so the structure is simple, and the drive power is low, so they are often used in serial printers. However, it is difficult to produce desired protrusions at low cost, and the quality of heat-generating printing is currently poor.
第１図は従来最も一般に用いられている突起形のサーマ
ルヘッドの構造を示す断面図で、１はアルミナ基板であ
り、その上に突起として厚み数十μｍのガラス２ａが焼
付けてあり、更にその上に発熱抵抗体３が引出しリード
線部４と共に形成され、耐磨耗膜５で覆われている。こ
の発熱体３に瞬間的にパルス電力を加えて発熱させ、耐
磨耗膜５の土を滑る感熱紙を発色させるものであるが、
突起部２がガラス質の為に熱放散が悪く、発熱体に徐々
に熱が蓄積されるという不都合の為に良い印字品質が得
られない。FIG. 1 is a cross-sectional view showing the structure of the most commonly used protrusion-shaped thermal head in the past. 1 is an alumina substrate, on which glass 2a with a thickness of several tens of μm is baked as a protrusion, and A heating resistor 3 is formed thereon together with a lead wire portion 4 and covered with an abrasion resistant film 5. Pulse power is momentarily applied to this heating element 3 to generate heat, and the thermal paper sliding on the soil of the wear-resistant film 5 develops color.
Since the projections 2 are made of glass, heat dissipation is poor and heat is gradually accumulated in the heating element, making it impossible to obtain good printing quality.
ガラス突起を薄くすると熱放散が良くなり、印字品質も
向上する筈であるが、今度はサーマルヘッドが平面に近
くなる為に紙の当り方が悪くなり、矢張り良い印字はで
きない。Making the glass protrusion thinner should improve heat dissipation and print quality, but since the thermal head is closer to a flat surface, it hits the paper poorly, making it impossible to print well.
突起も熱放散の良い磁器質で形成すると良いのであるが
、基板と一体になった構造のものは、作成が困難である
。即ち、磁器板を切削研磨して突起を作成する方法はコ
ストの非常に高いものとなる。壕だ、磁器成形品を焼結
する方法も、安価に出来ず、寸法精度の悪いものである
。It would be good if the protrusions were also made of porcelain with good heat dissipation, but it would be difficult to make one that is integrated with the substrate. That is, the method of creating protrusions by cutting and polishing a porcelain plate is extremely expensive. Unfortunately, the method of sintering porcelain molded products is not cheap and has poor dimensional accuracy.
（発明の目的）
本発明はこのような従来の突起形のサーマルヘッドの欠
点を解消し、印字品質の良いサーマルヘッドを安価に提
供するものである。(Object of the Invention) The present invention eliminates the drawbacks of the conventional protrusion-type thermal head and provides a thermal head with good printing quality at a low cost.
（発明の構成）
第２図は本発明の一実施例の構造を示す断面図であり、
その構造は第１図に示しだ従来例と殆んど変らないが、
突起部分２ｂの月質が金属酸化物の焼結体を主成分とす
るものであり、従来一般に用いられているガラスと大き
な違いがある。(Structure of the Invention) FIG. 2 is a sectional view showing the structure of an embodiment of the present invention.
Its structure is almost the same as the conventional example shown in Figure 1, but
The material of the protruding portion 2b is mainly composed of a sintered body of metal oxide, which is significantly different from conventionally commonly used glass.
このリジッドな磁器の上にリジッドな磁器を寸法精度よ
く形成した構造は、従来は作成困難とされ、全く検討さ
れていなかった。磁器を焼成すると、一般には縦横上下
のすべての方向に収縮が起こり、基板磁器が既にリジッ
ドな場合は、その上に強固な接着力をもってシンタリン
グしないと考えられていたからである。しかし、本発明
を実現するにあたり、実験を重ねた結果、シンターした
磁器板上にペースト状アルミナ磁器を薄く塗布し焼成す
ると、塗布されたアルミナはシンターする際に基板に垂
直方向にのみ収縮することが発見された。この現象を利
用して本発明はなされたものであり、この様な磁器の結
合体をサーマルヘッドの基板として使用するところに特
徴がある。A structure in which rigid porcelain is formed on rigid porcelain with high dimensional accuracy has been considered difficult to create and has not been considered at all. This is because when porcelain is fired, it generally shrinks in all directions, vertically, horizontally, top and bottom, and if the substrate porcelain is already rigid, it was thought that it would not sinter with strong adhesion on top of it. However, as a result of repeated experiments in realizing the present invention, it was found that when paste-like alumina porcelain is applied thinly to a sintered porcelain board and fired, the applied alumina contracts only in the direction perpendicular to the board during sintering. was discovered. The present invention has been made by taking advantage of this phenomenon, and is characterized in that such a ceramic composite is used as a substrate for a thermal head.
（実施例の説明）
次に第２図に示しだ本発明のサーマルヘッドの製造法に
ついて述べる。(Description of Embodiments) Next, a method for manufacturing the thermal head of the present invention shown in FIG. 2 will be described.
先ずＳｉ ０２ 、 ＭｇＯを含む純度９６％のＡｌ１
ｏ３粉体な、ターピネオールにエチルセルロースを溶
かしたビヒクルと混練したセラミックペーストを作成す
る。First, Al1 with a purity of 96% containing Si 02 and MgO
A ceramic paste is prepared by kneading o3 powder with a vehicle in which ethyl cellulose is dissolved in terpineol.
このセラミックペーストをリジッドなアルミナ基板の上
に突起部分のみスクリーン印刷し、最高温度約１６００
’、’ｌ：ｌにて焼成する。すると、基板面と垂直方向
にのみ収縮し、基板上に強固にシンターしたＡｌ２Ｏ３
の突起が得られる。この突起付き基板上に発熱抵抗体、
導体リード線、耐磨耗膜を形成してサーマルヘッドと成
すものである。This ceramic paste is screen printed on a rigid alumina substrate only on the protruding parts, and the maximum temperature is about 1600 yen.
', 'L: Fire at l. Then, the Al2O3 shrinks only in the direction perpendicular to the substrate surface and is firmly sintered onto the substrate.
Protrusions are obtained. A heating resistor is placed on this board with protrusions.
A thermal head is formed by forming conductor lead wires and an abrasion-resistant film.
第３図は本発明の他の実施例の構造を示す断面図であり
、その構造は第２図に示した実施例と殆んど変らないが
、突起部分が金属酸化物の焼結体から成る２ｂとそれを
覆うガラス質よりなる２Ｃ部分とから成っているところ
が異っている。FIG. 3 is a sectional view showing the structure of another embodiment of the present invention, and the structure is almost the same as that of the embodiment shown in FIG. The difference is that it consists of a portion 2b made of a glass material and a portion 2C made of glass covering it.
第２図の実施例では放熱性が良い為に、確かに良い印字
品質が得られるのであるが、金属酸化物ペーストの焼き
上がりの自由表面の凹凸が比較的５−
粗い為、数十／１ｍ以下の微細なパターンを出し難い。The embodiment shown in Figure 2 has good heat dissipation, so it is certainly possible to obtain good printing quality, but since the free surface of the baked metal oxide paste is relatively rough, it has a roughness of several tens of meters. It is difficult to produce the following fine patterns.
金属酸化物ペーストにガラス質成分を多く入れたり、金
属酸化物粒径を細かくしたり、または突起上を研磨する
こと等によりかなり微細なバタンか実現出来るが、数μ
ｍの微細なパターンを作成するのはむずかしい。Quite fine slams can be achieved by adding a large amount of glassy component to the metal oxide paste, making the metal oxide particles finer, or polishing the protrusions.
It is difficult to create a fine pattern of m.
そこで、本発明の他の実施例では、アルミナの突起の表
面を薄いガラス層で覆ってやり、突起表面を平滑化１−
２て、微細パターンを現出させようとするものである。Therefore, in another embodiment of the present invention, the surface of the alumina protrusion is covered with a thin glass layer to smooth the protrusion surface.
Second, it attempts to make a fine pattern appear.
具体的な製造方法は第２図の実施例と同様に、アルミナ
ペーストを印刷、焼成した後、この突起上に更にガラス
ペーストを約１０〜２０Ａｍスクリーン印刷し、その溶
融温度まで上げてガラスペーストを焼付ける工程を経た
後、従来例と同様に発熱体３、導体リード部４、耐磨耗
膜５をつけるものである。The specific manufacturing method is similar to the embodiment shown in Fig. 2. After printing and firing alumina paste, a glass paste of about 10 to 20 Am is further screen printed on the projections, and the glass paste is heated to its melting temperature. After the baking process, a heating element 3, a conductive lead part 4, and an abrasion-resistant film 5 are attached as in the conventional example.
（発明の効果）
以上説明し７たように本発明のサーマルヘッドは、ガラ
ス質より十倍程度も放熱性の良い磁器が発熱６一
体の直下にあるので、蓄熱することがなく、良い印字品
質が得られるものである。捷だ上に述べた様に突起の作
成方法が印刷１．て焼成するだけの簡単な工程の為、安
価に作成することが容易であり、そして突起がついてい
る為に平板形の様に機械部分を複雑な構造にする必要も
なく、感熱プリンター自体も安価となるものである。(Effects of the Invention) As explained above, in the thermal head of the present invention, porcelain, which has heat dissipation properties about 10 times better than glass, is placed directly under the heat generating unit 6, so there is no heat accumulation and good printing quality. is obtained. As mentioned above, the method for creating protrusions is printing 1. Because it is a simple process of just firing it, it is easy to make it at a low cost, and since it has protrusions, there is no need for a complicated mechanical structure like a flat plate type, and the thermal printer itself is inexpensive. This is the result.
１だ本発明の仙の実施例のように突起２ｂの表面を薄い
ガラスで覆ったものは、突起表面が情らかで１０Ａｍ以
下の微細パターンの発熱体をその上に現出させることが
出来、細かい印字の出来るサーマルヘッドを作成出来る
。捷だ、ガラス厚みを変えることにより熱放散を調整し
印字時の消費エネルギーを制御できるという利点をも有
している。1) When the surface of the protrusion 2b is covered with a thin glass as in the embodiment of the present invention, the protrusion surface is gentle and a heating element with a fine pattern of 10 Am or less can be made to appear on it. , it is possible to create a thermal head that can print finely. Another advantage is that by changing the glass thickness, heat dissipation can be adjusted and energy consumption during printing can be controlled.
第１図ハ従来のサーマルヘッドの断面図、第２図は本発
明の一実施例の構造を示す断面図、第３図は本発明の他
の実施例の構造を示す断面図である。゛
１ ・・・・・・・・・基板、２ａ、 ２ｂ、 ２ｃ・
・・・・・・・ 突起、３ ・・・・・・・・発熱抵抗
、 ４ ・・曲・・・引出しリード線部、５・・・・・
・・・耐磨耗膜。
特許出願人 松下電器産業株式会社
第１ｒ
ら
□□□−□□□□−−−−−−−−３≦５さ＝＝＝第２
図
、２ｂ
Ｘ□１
第３図
ｂ
ノ ４
二ニア≧、−一−ｚマ
３５７−
）１
ヒ１FIG. 1C is a cross-sectional view of a conventional thermal head, FIG. 2 is a cross-sectional view showing the structure of one embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the structure of another embodiment of the present invention.゛1 ・・・・・・・・・Substrate, 2a, 2b, 2c・
・・・・・・Protrusion, 3 ・・・・・・Heating resistor, 4 ・・・Curved lead wire part, 5 ・・・・・・
...Abrasion resistant film. Patent applicant Matsushita Electric Industrial Co., Ltd. 1st r et al.
Figure, 2b
Claims (3)
器基板上に設け、その突起上に発熱体を形成したことを
特徴とするサーマルヘッド。(1) A thermal head characterized in that a protrusion whose main component is a sintered body of metal oxide is provided on a ceramic substrate, and a heating element is formed on the protrusion.
、その上に発熱体を形成したことを特徴とする特許請求
の範囲第（１）項記載のサーマルヘッド。(2) A thermal head according to claim (1), characterized in that a protrusion provided on a ceramic substrate is covered with a glass material, and a heating element is formed on the protrusion.
ペーストをスクリーン印刷し、これを焼成して突起を形
成する工程を有することを特徴とするサーマルヘッドの
製造方法。(3) A method for manufacturing a thermal head, which comprises the steps of screen printing a tossle paste whose main component is porcelain on a rigid sintered porcelain substrate and firing the paste to form protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57222937A JPS59114076A (en) | 1982-12-21 | 1982-12-21 | Thermal head and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57222937A JPS59114076A (en) | 1982-12-21 | 1982-12-21 | Thermal head and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59114076A true JPS59114076A (en) | 1984-06-30 |
Family
ID=16790201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57222937A Pending JPS59114076A (en) | 1982-12-21 | 1982-12-21 | Thermal head and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59114076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265086A (en) * | 1988-08-30 | 1990-03-05 | Toshiba Lighting & Technol Corp | Heating element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5346457A (en) * | 1976-10-08 | 1978-04-26 | Furukawa Electric Co Ltd | Lead connecting method |
| JPS5783477A (en) * | 1980-11-14 | 1982-05-25 | Toshiba Corp | Thermal print head |
| JPS5783476A (en) * | 1980-11-14 | 1982-05-25 | Toshiba Corp | Thermal print head |
-
1982
- 1982-12-21 JP JP57222937A patent/JPS59114076A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5346457A (en) * | 1976-10-08 | 1978-04-26 | Furukawa Electric Co Ltd | Lead connecting method |
| JPS5783477A (en) * | 1980-11-14 | 1982-05-25 | Toshiba Corp | Thermal print head |
| JPS5783476A (en) * | 1980-11-14 | 1982-05-25 | Toshiba Corp | Thermal print head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265086A (en) * | 1988-08-30 | 1990-03-05 | Toshiba Lighting & Technol Corp | Heating element |
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