JP3734389B2 - Endoscope image sensor assembly device - Google Patents

Endoscope image sensor assembly device Download PDF

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Publication number
JP3734389B2
JP3734389B2 JP27564099A JP27564099A JP3734389B2 JP 3734389 B2 JP3734389 B2 JP 3734389B2 JP 27564099 A JP27564099 A JP 27564099A JP 27564099 A JP27564099 A JP 27564099A JP 3734389 B2 JP3734389 B2 JP 3734389B2
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Japan
Prior art keywords
width
circuit board
image sensor
ccd
endoscope
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JP27564099A
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JP2001095757A (en
Inventor
一昭 高橋
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Fujinon Corp
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Fujinon Corp
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Description

【0001】
【発明の属する技術分野】
本発明は内視鏡用撮像素子組付け装置、特にセラミックからなる回路基板に撮像素子を組み付ける際に、その全体の幅の寸法を正確かつ容易に合わせるための構成に関する。
【0002】
【従来の技術】
図5には、内視鏡(電子内視鏡)に配置される撮像素子組付け装置の構成が示されており、図示されるように、撮像素子であるCCD(Charge Coupled Device)1は、その上面端子部に複数のリード線2を取り付け、その上側にカバーガラス3を接着剤4等で貼着した構成となっている。即ち、この撮像素子組付け部材は、例えば搬送用テープに組み込まれて搬送されるCCD1の撮像面に導体リード線2及びカバーガラス3を実装し、製造・検査等を流れ作業的に量産するTAB(Tape Automated Bonding)方式で製作される。
【0003】
一方、回路基板5はセラミックからなり、この上面に形成された端子パッドKA に、上記CCD1のリード線2が接続される。また、この回路基板5には、端子パッドKA に図示していないプリント配線によって接続される端子パッドKB が形成されており、このパッドKB には、CCD1の駆動及びビデオ信号の伝送を行うための信号線が接続される。
【0004】
図6には、撮像素子の取付け形式が異なる別のタイプの構成が示されており、この例の回路基板6は、CCD1の横方向に長く形成したものである。この回路基板6にも、リード線2を接続するための端子パッドKC が設けられると共に、信号線を接続する端子パッドKD がCCD1の例えば右端側に配置される。このようなCCD1の取付け構造は、直視型、側視型の内視鏡、或いはプリズムを介して配置する等の各種の構造によって相違し、様々な構造が存在する。
【0005】
【発明が解決しようとする課題】
ところで、上記の回路基板5の材料であるセラミック板は、微細な配線パターンを引くことができ、回路基板5の極小化が可能になるという利点を有する反面、その寸法誤差(公差)が大きく、スコープの細径化が進む今日では、無視できないものとなっている。
【0006】
即ち、図5の場合は、例えば回路基板5の長手方向が内視鏡の軸方向に配置されることになり、細径化のために、回路基板5の横幅をCCD1の横幅とほぼ同一の幅D0 まで小さくしている。しかし、この横幅D0 の公差は±0.15mmであり、この公差により回路基板5が鎖線の位置まで大きくなることがあり、この場合には内視鏡の細径化を妨げることになる。
【0007】
また、この場合、回路基板5を上記の公差分だけ小さした値に設計することも考えられるが、CCD1のリード線2の取付け位置や信号線を接続することとの関係により、上述した端子パッドKA ,KB が回路基板5の端部ぎりぎりまで配置されており、この横幅D0をCCD1の幅以下にするのは好ましくない。
また、図6に示す構成では、回路基板6の上下端側に端子パッドKC が存在することから、これ以上に回路基板6の縦幅L0 を小さくすることはできない。
【0008】
本発明は上記問題点に鑑みてなされたものであり、その目的は、回路基板を製作する際の寸法公差が大きくなる場合でも、その公差を吸収して正確な寸法に設定し、内視鏡の細径化等を妨げることのない内視鏡用撮像素子組付け装置を提供することにある。
【0009】
【課題を解決するための手段】
上記目的を達成するために、請求項1に係る内視鏡用撮像素子組付け装置は、被観察体を撮像するための撮像素子と、この撮像素子のリード線を接続する端子パッドを有する回路基板とを備えた内視鏡用撮像素子組付け装置において、上記回路基板を2分割し、これら2枚の回路基板の合計幅が組付け時の基板全体の幅よりも小さくなるようにして所定幅の幅調整用スペースを設けたことを特徴とする。
【0010】
上記の構成によれば、調整用スペースを用いて2枚の回路基板を設計寸法に正確に合わせることができ、セラミック回路基板に比較的大きな公差(又は誤差)があったとしても、組付け時には設計通りの寸法を出すことが可能となる。
【0011】
【発明の実施の形態】
図1及び図2には、実施形態の第1例に係る内視鏡用撮像素子組付け装置が示されており、図示のCCD1、リード線2及びカバーガラス3は、図4等と同様に、TAB(Tape Automated Bonding)方式により製作されたものである。このCCD1とカバーガラス3は周辺部の接着剤4によって接着されており、CCD1の撮像面側はカバーガラス3との間で気密状態が維持されている。そして、このCCD1の取付け回路基板として、左右に分割された2枚の回路基板11,12が設けられ、これらの基板11,12の上面には、CCD1のリード線2を接続するための端子パッドKE と、このパッドKE に不図示の配線パターンで接続され、信号線を接続するための端子パッドKF が形成される。
【0012】
そして、上記回路基板11と12の間には横幅を調整するための調整用スペースS1 (幅d1 )が設定される。即ち、回路基板11の横幅D1 ともう一方の回路基板12の横幅D2 は、CCD1を取り付ける回路基板全体の設計横幅がD0 であるとすると、D1 +D2 +d1 =D0 となるように、幅d1 のスペースS1 が設けられる。この調整用スペース幅d1 は、例えば公差が±0.15mmである場合、0.3mm以上に設定しており、これにより公差分の幅が調整できることになる。また、上記端子パッドKE は回路基板11,12を横方向に動かした場合でもCCD1のリード線2との接続が可能なように、その横幅D3 を従来のものより少し広くしている。
【0013】
第1例は以上の構成からなり、上記の2分割された回路基板11と回路基板12はそれらの間に設けられた調整用スペースS1 の幅d1 の範囲で横方向へずらすことができ、それぞれの回路基板11,12に±0.15mmの公差があったとしても、全体の幅を設計値のD0 に正確に合せることが可能となる。
【0014】
図3には、撮像素子の取付け形式が異なる上記図6のタイプに対応した第2例の構成が示されており、この場合は、CCD1の取付け回路基板として、上下に分割された2枚の回路基板15,16が設けられ、これらの基板15,16の上面に、CCD1のリード線2を接続する端子パッドKG と、信号線を接続する端子パッドKH が形成される。
【0015】
そして、上記回路基板15の縦幅L1 ともう一方の回路基板16の縦幅L2 が、CCD1を取り付ける回路基板全体の設計縦幅をL0 とすると、L1 +L2 +l1 =L0 となるように設定され、この幅l1 のスペースS2 が両基板15,16間に設定される。この調整用スペース幅l1 も、例えば公差が±0.15mmである場合、0.3mm以上に設定しており、これにより公差分の幅が調整可能となる。また、下側の端子パッドKG は回路基板15,16を縦方向に動かした場合でもCCD1のリード線2との接続が十分に可能なように、その縦幅L3 を従来のものより少し広くする。
【0016】
このような第2例によれば、上下に2分割された回路基板15と回路基板16はそれらの間に設けられた調整用スペースS2 の幅l1 の範囲だけ上下方向へずらすことができ、それぞれの基板15,16に±0.15mmの公差があったとしても、全体の縦幅を設計値のL0 に正確に合せることが可能となる。
【0017】
図4には、2枚の回路基板の分割の仕方の異なる第3例の構成が示されており、この第3例は、上下の端子パッドの配置を考慮した分割線で分割したものである。即ち、図4に示されるように、この回路基板は段付き形状線で左右に2分割した回路基板19と20からなり、これらの基板19,20の上面には、CCD1のリード線2を接続する端子パッドK と、信号線を接続する端子パッドK が形成されるが、これらの端子パッドK ,K の配置を考慮し、これらの複数のパッドK ,K のそれぞれを分割するために最適な位置(上側K 、下側K ,K において分割の最適位置)となる図の段付き形状線で幅d2 のスペースS3 を設けたものである。
【0018】
そして、この場合も、第1例と同様に、D4 +D5 +d2 =D0 となり、このスペースS3 の幅d2 の範囲で横幅を調整することができる。また、この第3例では、段差部を当接することにより、2枚の回路基板19,20の縦方向の位置合せができる利点がある。なお、この第3例の構成は上記第2例にも同様に適用することができる。
【0019】
【発明の効果】
以上説明したように、本発明によれば、回路基板を2分割し、これら2枚の回路基板の合計幅が組付け時の基板全体の幅よりも小さくなるように所定幅の幅調整用スペースを設けたので、回路基板を製作する際の寸法公差(又は誤差)が大きくなる場合でも、その公差を吸収して正確な寸法に設定することができ、内視鏡の細径化等を妨げることもないという利点がある。
【図面の簡単な説明】
【図1】本発明の実施形態の第1例に係る内視鏡用撮像素子組付け装置の構成を示し、図(A)は正面図、図(B)は左側面図、図(C)は下側側面図である。
【図2】図1の撮像素子組付け装置の斜視図である。
【図3】実施形態の第2例の撮像素子組付け装置の構成を示し、図(A)は正面図、図(B)は左側面図、図(C)は下側側面図である。
【図4】実施形態の第3例の撮像素子組付け装置の構成を示す正面図である。
【図5】従来の撮像素子組付け装置の構成を示し、図(A)は正面図、図(B)は左側面図である。
【図6】従来の撮像素子組付け装置の他の構成を示す正面図である。
【符号の説明】
1 … CCD、
2 … リード線、
5,6 … 回路基板、
11,12,15,16,19,20 … 分割回路基板、
1 ,S2 ,S3 … 調整用スペース、
A 〜KJ … 端子パッド。
[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope image sensor assembling apparatus, and more particularly to a configuration for accurately and easily matching the overall width dimension when an image sensor is assembled to a circuit board made of ceramic.
[0002]
[Prior art]
FIG. 5 shows the configuration of an image sensor assembly device arranged in an endoscope (electronic endoscope). As shown in the figure, a CCD (Charge Coupled Device) 1 that is an image sensor is shown in FIG. A plurality of lead wires 2 are attached to the upper surface terminal portion, and a cover glass 3 is adhered to the upper side with an adhesive 4 or the like. That is, the imaging element assembly member is a TAB that is mounted on the imaging surface of the CCD 1 that is incorporated and transported on a transport tape, for example, and is mass-produced through the flow of manufacturing and inspection. Manufactured by (Tape Automated Bonding) method.
[0003]
On the other hand, the circuit board 5 is made of ceramic, the terminal pads K A, which is formed on the upper surface, the leads 2 of the CCD1 is connected. Further, in the circuit board 5, terminal pads K B to be connected by printed wiring (not shown) to the terminal pads K A is formed, this pad K B, the transmission of the drive and the video signal of CCD1 A signal line for performing is connected.
[0004]
FIG. 6 shows another type of configuration in which the image sensor is mounted differently. The circuit board 6 in this example is formed long in the lateral direction of the CCD 1. The circuit board 6 is also provided with a terminal pad K C for connecting the lead wire 2, and a terminal pad K D for connecting the signal line is disposed on the right end side of the CCD 1, for example. Such a mounting structure of the CCD 1 is different depending on various structures such as a direct-view type, a side-view type endoscope, or a prism, and various structures exist.
[0005]
[Problems to be solved by the invention]
By the way, the ceramic plate which is the material of the circuit board 5 has an advantage that a fine wiring pattern can be drawn and the circuit board 5 can be minimized, but its dimensional error (tolerance) is large. Nowadays, as the scope becomes thinner, it cannot be ignored.
[0006]
That is, in the case of FIG. 5, for example, the longitudinal direction of the circuit board 5 is arranged in the axial direction of the endoscope, and the width of the circuit board 5 is substantially the same as the width of the CCD 1 in order to reduce the diameter. The width is reduced to D 0 . However, the tolerance of the lateral width D 0 is ± 0.15 mm, and the tolerance may increase the circuit board 5 to the position of the chain line. In this case, the diameter of the endoscope is hindered.
[0007]
In this case, the circuit board 5 may be designed to have a value that is reduced by the above-described tolerance, but the terminal pad described above depends on the attachment position of the lead wire 2 of the CCD 1 and the connection of the signal line. K A and K B are arranged up to the edge of the circuit board 5, and it is not preferable to set the lateral width D 0 to be equal to or smaller than the width of the CCD 1.
Further, in the configuration shown in FIG. 6, since the terminal pads K C exist on the upper and lower ends of the circuit board 6, the vertical width L 0 of the circuit board 6 cannot be further reduced.
[0008]
The present invention has been made in view of the above problems, and its purpose is to absorb the tolerance and set it to an accurate dimension even when a dimensional tolerance when manufacturing a circuit board becomes large. It is an object of the present invention to provide an endoscope image sensor assembling apparatus that does not hinder the diameter reduction of the endoscope.
[0009]
[Means for Solving the Problems]
To achieve the above object, an endoscope imaging device assembling apparatus according to claim 1 is a circuit having an imaging device for imaging an object to be observed and a terminal pad for connecting a lead wire of the imaging device. In an endoscope imaging device assembling apparatus provided with a substrate, the circuit board is divided into two parts, and a predetermined width is set such that the total width of these two circuit boards is smaller than the width of the whole board when assembled. A space for adjusting the width is provided.
[0010]
According to the above configuration, the two circuit boards can be accurately adjusted to the design dimensions by using the adjustment space, and even if there is a relatively large tolerance (or error) in the ceramic circuit board, It is possible to produce dimensions as designed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an endoscope image sensor assembling apparatus according to a first example of the embodiment. The illustrated CCD 1, lead wire 2 and cover glass 3 are the same as in FIG. 4 and the like. , Manufactured by TAB (Tape Automated Bonding) method. The CCD 1 and the cover glass 3 are bonded to each other by an adhesive 4 at the peripheral portion, and the imaging surface side of the CCD 1 is maintained in an airtight state with the cover glass 3. As the circuit board for mounting the CCD 1, two circuit boards 11 and 12 divided into left and right are provided, and terminal pads for connecting the lead wires 2 of the CCD 1 are provided on the upper surfaces of the boards 11 and 12. A terminal pad K F is connected to K E and the pad K E with a wiring pattern (not shown) to connect a signal line.
[0012]
An adjustment space S 1 (width d 1 ) for adjusting the lateral width is set between the circuit boards 11 and 12. That is, the width D 2 of the width D 1 Tomo one circuit board 12 of the circuit board 11, the design width of the entire circuit board mounting the CCD1 is assumed to be D 0, the D 1 + D 2 + d 1 = D 0 as, it is provided a space S 1 of the wide d 1. For example, when the tolerance is ± 0.15 mm, the adjustment space width d 1 is set to 0.3 mm or more, and thus the tolerance width can be adjusted. Further, the terminal pad K E is a circuit board 11 and 12 so as to allow connection of the lead wire 2 of the even CCD1 when moved laterally, slightly wider than the width D 3 of the prior art.
[0013]
The first example has the above-described configuration, and the circuit board 11 and the circuit board 12 divided into two parts can be shifted in the lateral direction within the range of the width d 1 of the adjustment space S 1 provided therebetween. Even if the circuit boards 11 and 12 have a tolerance of ± 0.15 mm, the entire width can be accurately matched to the design value D 0 .
[0014]
FIG. 3 shows a configuration of a second example corresponding to the type of FIG. 6 in which the image sensor is mounted differently. In this case, as the mounting circuit board of the CCD 1, two sheets divided vertically are shown. is provided a circuit board 15 and 16, the upper surface of these substrates 15 and 16, the terminal pad K G for connecting the lead wire 2 of the CCD 1, the terminal pads K H for connecting the signal line is formed.
[0015]
When the vertical width L 2 of the longitudinal width L 1 Tomo one of the circuit board 16 of the circuit board 15, the design height of the entire circuit board mounting the CCD1 and L 0, L 1 + L 2 + l 1 = L 0 The space S 2 having the width l 1 is set between the substrates 15 and 16. For example, when the tolerance is ± 0.15 mm, the adjustment space width l 1 is set to 0.3 mm or more, and thereby the tolerance width can be adjusted. Further, as the terminal pad K G of the lower connection is sufficiently possible and lead 2 even CCD1 when you move the circuit board 15 and 16 in the vertical direction, the vertical width L 3 A bit than the conventional Make it wide.
[0016]
According to the second example, the circuit board 15 and the circuit board 16 which are divided into two parts in the vertical direction can be shifted in the vertical direction by the range of the width l 1 of the adjustment space S 2 provided therebetween. Even if each of the substrates 15 and 16 has a tolerance of ± 0.15 mm, the overall vertical width can be accurately matched to the design value L 0 .
[0017]
FIG. 4 shows the configuration of a third example in which two circuit boards are divided differently. This third example is divided by dividing lines in consideration of the arrangement of upper and lower terminal pads. . That is, as shown in FIG. 4, this circuit board is composed of circuit boards 19 and 20 divided into left and right by a stepped shape line, and the lead wire 2 of the CCD 1 is connected to the upper surfaces of these boards 19 and 20. terminal pad K I to And terminal pad K J for connecting signal lines Although but are formed, these terminal pad K I , K J Considering the arrangement, the plurality of pads K I , K J Optimal position to divide the respective (upper K I , Lower K I , K J The space S 3 having the width d 2 is provided by the stepped shape line in the figure, which is the optimal position for division in FIG.
[0018]
Also in this case, similarly to the first example, D 4 + D 5 + d 2 = D 0 , and the lateral width can be adjusted within the range of the width d 2 of the space S 3 . Further, the third example has an advantage that the two circuit boards 19 and 20 can be aligned in the vertical direction by contacting the stepped portions. The configuration of the third example can be similarly applied to the second example.
[0019]
【The invention's effect】
As described above, according to the present invention, the circuit board is divided into two parts, and the width adjustment space having a predetermined width so that the total width of the two circuit boards is smaller than the width of the whole board when assembled. Therefore, even when the dimensional tolerance (or error) when manufacturing a circuit board increases, the tolerance can be absorbed and set to an accurate dimension, which prevents the diameter of the endoscope from being reduced. There is an advantage that there is nothing.
[Brief description of the drawings]
FIG. 1 shows a configuration of an endoscope image sensor assembling apparatus according to a first example of an embodiment of the present invention, where FIG. (A) is a front view, FIG. (B) is a left side view, and FIG. FIG. 6 is a lower side view.
2 is a perspective view of the image sensor assembly apparatus of FIG. 1; FIG.
3A and 3B show a configuration of an image sensor assembly apparatus according to a second example of the embodiment, in which FIG. A is a front view, FIG. B is a left side view, and FIG.
FIG. 4 is a front view illustrating a configuration of an image sensor assembly apparatus according to a third example of the embodiment.
FIGS. 5A and 5B show a configuration of a conventional image sensor assembling apparatus, wherein FIG. 5A is a front view and FIG. 5B is a left side view.
FIG. 6 is a front view showing another configuration of a conventional image sensor assembling apparatus.
[Explanation of symbols]
1 ... CCD,
2… Lead wire,
5, 6 ... circuit board,
11, 12, 15, 16, 19, 20 ... divided circuit boards,
S 1 , S 2 , S 3 ... adjustment space,
K A to K J ... Terminal pads.

Claims (1)

被観察体を撮像するための撮像素子と、
この撮像素子のリード線を接続する端子パッドを有する回路基板とを備えた内視鏡用撮像素子組付け装置において、
上記回路基板を2分割し、これら2枚の回路基板の合計幅が組付け時の基板全体の幅よりも小さくなるようにして所定幅の幅調整用スペースを設けたことを特徴とする内視鏡用撮像素子組付け装置。
An image sensor for imaging the object to be observed;
In an endoscope image pickup device assembling apparatus comprising a circuit board having a terminal pad for connecting a lead wire of the image pickup device,
An internal view characterized in that the circuit board is divided into two parts, and a space for adjusting the width of a predetermined width is provided so that the total width of the two circuit boards is smaller than the width of the whole board when assembled. Mirror image sensor assembly device.
JP27564099A 1999-09-29 1999-09-29 Endoscope image sensor assembly device Expired - Fee Related JP3734389B2 (en)

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US6953432B2 (en) 2003-05-20 2005-10-11 Everest Vit, Inc. Imager cover-glass mounting
US8213676B2 (en) 2006-12-20 2012-07-03 Ge Inspection Technologies Lp Inspection apparatus method and apparatus comprising motion responsive control
US9633426B2 (en) 2014-05-30 2017-04-25 General Electric Company Remote visual inspection image capture system and method
US8810636B2 (en) 2006-12-20 2014-08-19 Ge Inspection Technologies, Lp Inspection apparatus method and apparatus comprising selective frame output

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