JPH0626916B2 - Method for manufacturing thermal print head - Google Patents
Method for manufacturing thermal print headInfo
- Publication number
- JPH0626916B2 JPH0626916B2 JP60108836A JP10883685A JPH0626916B2 JP H0626916 B2 JPH0626916 B2 JP H0626916B2 JP 60108836 A JP60108836 A JP 60108836A JP 10883685 A JP10883685 A JP 10883685A JP H0626916 B2 JPH0626916 B2 JP H0626916B2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- resistor
- electrode
- print head
- supplied
- 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 - Lifetime
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
- B41J2/345—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 characterised by the arrangement of resistors or conductors
Landscapes
- Electronic Switches (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明はサーマルプリントヘッドの製造方法に関す
る。The present invention relates to a method for manufacturing a thermal print head.
（従来の技術） この種サーマルプリントヘッドにおいては、その発熱ド
ットを高密度化すれば画質が向上することが知られてお
り、そのためその高密度化が強く要求されている。(Prior Art) In this type of thermal print head, it is known that if the density of the heating dots is increased, the image quality is improved. Therefore, there is a strong demand for higher density.
第５図は従来のパターンの一例を示し、帯状の抵抗体Ｒ
を横切るように共通電極Ｃと個別電極Ｓとを交互に配列
して構成したものである。この構成によれば隣合う各電
極によって区画された抵抗体の互いに隣合う２個の区画
抵抗部Ｍをもって、ひとつの発熱ドットが構成される。FIG. 5 shows an example of a conventional pattern, which is a strip-shaped resistor R.
The common electrode C and the individual electrode S are alternately arranged so as to cross the line. According to this configuration, one heating dot is configured by the two partitioning resistor portions M adjacent to each other of the resistor body partitioned by the adjacent electrodes.
この構成によれば各発熱ドツトは区画抵抗部密度の半分
となるので、発熱ドットを高密度化するには区画抵抗部
密度を高めなければならず、したがってその高密度化は
あまり期待できない。このような構成によるドット密度
は１mm当り８ドットが限度とされている。According to this configuration, each heating dot is half of the partition resistance portion density, and therefore, the partition resistance portion density must be increased in order to increase the density of the heating dots, and therefore the high density cannot be expected so much. With such a configuration, the dot density is limited to 8 dots per mm.
第６図は従来の他の例を示すもので、これは互いに分離
して形成されてある抵抗体Ｒのそれぞれの一方の端部に
共通電極Ｃを、また他方の端部に個別電極Ｓをそれぞれ
重ねて形成した構成である。これによれば各発熱ドット
は個々の抵抗体Ｒによって構成されることになる。FIG. 6 shows another conventional example, in which a resistor R formed separately from each other has a common electrode C at one end and an individual electrode S at the other end. Each of them is formed by stacking them. According to this, each heating dot is constituted by the individual resistor R.
しかし各抵抗体Ｒを厚膜で構成する場合、各抵抗体Ｒと
個別電極Ｓとを重ね合わして形成するので、個別電極Ｓ
上から抵抗体Ｒが流れてしまい、隣合う抵抗体Ｒ同志が
接触してしまう恐れがある。そのため隣合う抵抗体Ｒを
充分に接近させることができず、そのためこれとても発
熱ドットの高密度化があまり期待できない。具体的には
１mm当り６ドットが限度とされている。However, when each resistor R is formed of a thick film, each resistor R and the individual electrode S are formed so as to overlap each other.
The resistor R may flow from above, and adjacent resistors R may come into contact with each other. Therefore, the adjacent resistors R cannot be sufficiently brought close to each other, and therefore, it is not possible to expect much increase in the density of the heating dots. Specifically, the limit is 6 dots per mm.
（発明が解決しようとする問題点） この発明はパターンをあまり細かくすることを必要とせ
ずして、しかも簡単に発熱ドットの高密度化を図ること
を目的とする。(Problems to be Solved by the Invention) An object of the present invention is to make it possible to easily increase the density of heating dots without requiring the pattern to be too fine.
（問題点を解決するための手段） この発明は厚膜からなる帯状の発熱用の抵抗体の一方の
側縁と他方の側縁とに互いに対となるように複数の電極
を形成するとともに、更に互いに対となっている前記電
極間をまたぐように前記抵抗体の表面に表面電極を形成
し、そのあと前記隣合う表面電極間にプリントのために
前記対となっている電極間に供給する電力よりも大きい
電力を供給することによって、隣合う表面電極間に存在
している抵抗体部分を高抵抗化し、その後前記表面電極
を除去するようにしたことを特徴とする。(Means for Solving Problems) The present invention forms a plurality of electrodes on one side edge and the other side edge of a strip-shaped heat-generating resistor made of a thick film so as to be paired with each other. Further, a surface electrode is formed on the surface of the resistor so as to straddle between the paired electrodes, and then supplied between the paired electrodes for printing between the adjacent surface electrodes. It is characterized in that the resistance portion existing between the adjacent surface electrodes is made to have a high resistance by supplying electric power larger than the electric power, and then the surface electrodes are removed.
一般に膜厚の抵抗体に短時間に過電力を供給すると、抵
抗値が高くなることが知られている。これは抵抗ペース
トを形成している抵抗性の粒子同志の接触部分が、供給
された電力により過加熱されて溶断され、そのため粒子
間の接触が断たれることによって抵抗値が高くなると考
えられる。It is generally known that the resistance value increases when overpower is supplied to a resistor having a film thickness in a short time. It is considered that this is because the contact portion between the resistive particles forming the resistance paste is overheated by the supplied electric power and melted and cut, so that the contact between the particles is broken and the resistance value becomes high.
具体的にはプリントのために供給される電力がたとえば
60Ｗ／mm2である場合、その約２倍である120Ｗ／mm2の
電力、たとえば120mj／mm2を1ms にわたって供給する
と、抵抗値が急激に上昇していく。なお極端に大きな電
力を供給した場合は、電極間の抵抗体部分は溶断してし
まってその抵抗値は極端に大きくなってしまう。Specifically, the power supplied for printing is
In the case of 60 W / mm 2 , when the electric power of 120 W / mm 2 , which is about twice that of 120 Wj / mm 2, is supplied for 1 ms, the resistance value rises sharply. When an extremely large electric power is supplied, the resistor portion between the electrodes is melted and the resistance value becomes extremely large.
このような抵抗値の上昇によって隣合う表面電極間がほ
ぼオープンまたはアイソレートされるようになる。した
がって表面電極間を充分に狭くして形成してもなんの支
障も生じない。この結果発熱ドットを高密度に製作する
ことができるようになる。Due to such an increase in the resistance value, the adjacent surface electrodes are almost opened or isolated. Therefore, even if the space between the surface electrodes is made sufficiently small, no trouble will occur. As a result, the heating dots can be manufactured with high density.
（実施例） この発明の実施例を図によって説明する。１はセラミッ
クのような絶縁物からなる基板、２は基板１の表面に厚
膜によって形成された発熱用の抵抗体で、これは帯状に
長く形成されてある。３は抵抗体２の一方の側縁に重ね
られて形成された複数の第１の電極、４は他方の側縁に
重ねられて形成された複数の第２の電極である。第１、
第２電極は互いに向い合って対となるように位置されて
いる。これまでの工程は第１図、第２図に示す通りであ
る。(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a substrate made of an insulating material such as ceramics, and 2 is a resistor for heat generation, which is formed by a thick film on the surface of the substrate 1, and is formed in a long strip shape. Reference numeral 3 is a plurality of first electrodes formed on one side edge of the resistor 2 and 4 is a plurality of second electrodes formed on the other side edge. First,
The second electrodes are positioned so as to face each other and form a pair. The steps up to this point are as shown in FIGS. 1 and 2.
この場合、電極３、電極４の表面には抵抗体２が各電極
にまたがるよう形成されるので、第６図の構成とは異な
り、隣合う電極３の間、或いは隣合う電極４の間が充分
に近接するように形成できる。In this case, since the resistor 2 is formed on the surfaces of the electrodes 3 and 4 so as to straddle the respective electrodes, there is a gap between the adjacent electrodes 3 or between the adjacent electrodes 4 unlike the configuration of FIG. It can be formed so as to be sufficiently close.
次にこの発明にしたがい、対となっている電極３、４間
に位置するように、表面電極５を第３図、第４図に示す
ように前記抵抗体２の表面に形成する。そしてこのあと
プリントのために対となっている電極３と電極４との間
に供給する電力よりも充分に大きい電力、たとえば120
Ｗ／mm2相当の過電力を隣合う前記表面電極５間に供給
する。Next, according to the present invention, a surface electrode 5 is formed on the surface of the resistor 2 as shown in FIGS. 3 and 4 so as to be located between the paired electrodes 3 and 4. Then, after that, a power sufficiently larger than the power supplied between the electrode 3 and the electrode 4 which are paired for printing, for example, 120
An overpower equivalent to W / mm 2 is supplied between the adjacent surface electrodes 5.
この電極供給によって表面電極５間の抵抗体部分２Ａの
抵抗値が他の部分よりたとえば２〜３倍以上に高くな
る。このように抵抗体部分２Ａの高抵抗体によって、各
表面電極５間にしたがって対となっている電極３，４間
の抵抗体部分２Ｂの隣同志がほぼオープン状態にされる
ことになる。このあと表面電極５を選択エッチングによ
って除去する。Due to this electrode supply, the resistance value of the resistor portion 2A between the front surface electrodes 5 becomes, for example, 2-3 times higher than that of the other portions. In this manner, the high resistance body of the resistance body portion 2A causes the adjacent portions of the resistance body portion 2B between the electrodes 3 and 4 forming a pair according to the surface electrodes 5 to be substantially opened. Then, the surface electrode 5 is removed by selective etching.
この除去のあとは第１図、第２図と同じ形態となる。な
おこのエッチングを容易にするために、電極３，４と表
面電極５とを異種の金属によって形成するとよく、たと
えば電極３，４を金によって形成したとき、表面電極５
を銀によって形成するとよい。After this removal, the form is the same as in FIGS. 1 and 2. In order to facilitate this etching, the electrodes 3 and 4 and the surface electrode 5 may be made of different metals. For example, when the electrodes 3 and 4 are made of gold, the surface electrode 5
May be formed of silver.
このようにして隣合う抵抗体部分２Ｂがほぼオープンに
なれば、プリント時、電極３と電極４との間に電力を供
給しても抵抗体部分２Ｂのみが発熱するようになる。こ
の方法によって構成されるドット密度は1mm当り１６ド
ットまで可能であることが確かめられている。In this way, if the adjacent resistor portions 2B are almost opened, only the resistor portion 2B will generate heat during printing when power is supplied between the electrodes 3 and 4. It has been confirmed that the dot density formed by this method can be up to 16 dots per mm.
なお実際には一方の電極たとえば電極３の各端部を一括
接続してこれを共通電極として使用するようにするとよ
い。また図には省略してあるが、実際には抵抗体、電極
の表面をガラスその他でコーティングすることはいうま
でもない。Actually, one electrode, for example, each end of the electrode 3 may be collectively connected and used as a common electrode. Although not shown in the figure, it goes without saying that the surfaces of the resistors and electrodes are actually coated with glass or the like.
（発明の効果） 以上詳述したようにこの発明によれば、対となっている
電極間の発熱ドット用の抵抗体部分同志を高抵抗化によ
ってほぼオーブンまたはアイソレートさせることがで
き、したがって電極間を充分に接近させて形成すること
ができるので、発熱ドットの高密度化が可能となるとい
った効果を奏する。(Effects of the Invention) As described in detail above, according to the present invention, the resistor portions for the heating dots between the paired electrodes can be almost ovenized or isolated by increasing the resistance. Since the spaces can be formed sufficiently close to each other, there is an effect that it is possible to increase the density of the heating dots.
第１図はこの発明の実施例を示す平面図、第２図は同断
面図、第３図は製造工程を示す平面図、第４図は同断面
図、第５図、第６図は従来例の平面図である。 ２……抵抗体、２Ａ，２Ｂ……抵抗体部分、３、４……
電極、５……表面電極、FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is the same sectional view, FIG. 3 is a plan view showing a manufacturing process, FIG. 4 is the same sectional view, FIG. 5 and FIG. It is a top view of an example. 2 ... Resistor, 2A, 2B ... Resistor part, 3, 4 ...
Electrodes, 5 ... Surface electrodes,
Claims (1)
の側縁と他方の側縁とに互いに対となるように複数の電
極を形成するとともに、更に互いに対となっている前記
電極間をまたぐように前記抵抗体の表面に表面電極を形
成し、そのあと隣合う前記表面電極間にプリントのため
に前記対となっている電極間に供給する電力よりも大き
い電力を供給することによって、隣合う前記表面電極間
に存在している抵抗体部分を高抵抗化し、その後前記表
面電極を除去するようにしたことを特徴とするサーマル
プリントヘッドの製造方法。1. A plurality of electrodes are formed on one side edge and the other side edge of a strip-shaped heat-generating resistor made of a thick film so as to be paired with each other, and are further paired with each other. A surface electrode is formed on the surface of the resistor so as to straddle between the electrodes, and then a power larger than that supplied between the paired electrodes for printing is supplied between the adjacent surface electrodes. Accordingly, the resistance portion existing between the adjacent surface electrodes is made to have a high resistance, and then the surface electrode is removed, and the method for manufacturing a thermal print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60108836A JPH0626916B2 (en) | 1985-05-20 | 1985-05-20 | Method for manufacturing thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60108836A JPH0626916B2 (en) | 1985-05-20 | 1985-05-20 | Method for manufacturing thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61266264A JPS61266264A (en) | 1986-11-25 |
| JPH0626916B2 true JPH0626916B2 (en) | 1994-04-13 |
Family
ID=14494787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60108836A Expired - Lifetime JPH0626916B2 (en) | 1985-05-20 | 1985-05-20 | Method for manufacturing thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626916B2 (en) |
-
1985
- 1985-05-20 JP JP60108836A patent/JPH0626916B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61266264A (en) | 1986-11-25 |
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