JP3805441B2 - Carrier tape - Google Patents

Carrier tape Download PDF

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Publication number
JP3805441B2
JP3805441B2 JP27606896A JP27606896A JP3805441B2 JP 3805441 B2 JP3805441 B2 JP 3805441B2 JP 27606896 A JP27606896 A JP 27606896A JP 27606896 A JP27606896 A JP 27606896A JP 3805441 B2 JP3805441 B2 JP 3805441B2
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Japan
Prior art keywords
package
carrier tape
mounting shelf
side wall
shelf
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JP27606896A
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Japanese (ja)
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JPH10120075A (en
Inventor
康幸 高尾
浩 加藤
知康 加藤
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Shin Etsu Polymer Co Ltd
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Shin Etsu Polymer Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、電子部品の中でエリア型パッケージに分類されるBGA(ボールグリッドアレイ)パッケージ(下面にハンダボールを格子状に配列したLSIパッケージ)、及びCSP(チップサイズパッケージ)と呼称されるLSIチップサイズのパッケージの中で、下部にハンダボールを格子状に配列したμBGA(マイクロボールグリッドアレイ)パッケージ、並びに配線接続用のバンプをLSIチップ上に形成したバンプチップ、さらにはベアチップを輸送、保管及び実装するのに有用なキャリアテープに関する。
【0002】
【従来の技術】
BGAパッケージを収納するキャリアテープとして、出願人は先に、収納部に載置棚を有する構造のキャリアテープを提案した(特開平8−11930号)。このキャリアテープは、収納したBGAパッケージが、収納部側壁と載置棚との境をなすアール部に乗り上げて傾くという、従来の不都合を回避するため、収納部側壁と載置棚との境に溝を形成し、この溝内にアール部が位置するようにしたものである。
【0003】
【発明が解決しようとする課題】
しかし、上記提案したキャリアテープに、μBGAパッケージのようなフランジ部の小さなパッケージを収納しようとすると、溝の存在により載置棚の幅が必然的に狭くなる。このような幅の狭い載置棚と溝部を従来技術で加工しようとすると、技術的に非常に困難である。また、上記溝により、加工後の載置棚の肉厚が溝なしの載置棚より薄くなり、強度が弱くなるという欠点がある。
【0004】
また、載置棚の幅が十分にある場合でも、上記キャリアテープの構造では、パッケージを収納した際、パッケージのフランジ部と載置棚とは面接触となるため、成形時の収縮等、載置棚表面の平滑性を損ねる要因が存在すると載置棚に凹凸が生じ、これが収納したBGAパッケージの傾きや浮き上がり等によるがたつき発生の要因となる。
【0005】
本発明は、上記の問題を解決するものであり、収納したBGAパッケージ等のエリア型パッケージ(以下、単にパッケージと略記する。)のがたつきを防止し、載置棚の加工が技術的に容易でかつ十分な強度を有するキャリアテープを提供することを課題とする。
【0006】
【課題を解決するための手段】
上記の課題を解決するために、請求項1のキァリアテープでは、収納部側壁と載置棚表面との角度θを、θ<90゜としている。
これにより、収納したパッケージのフランジ部は載置棚と線接触で保持され、載置棚の平滑性に起因するパッケージのがたつきが防止されると共に、収納部側壁と載置棚との境のアール部にパッケージが触れて乗り上げるという不都合が防止される。
さらに、請求項2のキァリアテープでは、上記キァリアテープの収納部側壁に、内側に突出する一以上の上記突起部を設けて、収納部におけるパッケージの位置決めを容易にしている。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を、添付した図面に基づいて説明する。
図1は、本発明のキャリアテープの一例の図であり、(a)は収納部を示す部分平面図、(b)はそのX−X線の断面図、(c)は、その一部拡大断面図である。図2〜図4は、それぞれ本発明のキャリアテープの収納部の一例を示す図であり、(a)はその平面図、(b)は斜視図である。
【0008】
まず、請求項1の発明は、図1(c)に示すように、キャリアテープ1の収納部側壁2と載置棚3の表面との角度θを、θ<90゜とすることにより、収納したパッケージ4と載置棚3の接触部を従来の面接触から線接触にしている。
従来のキャリアテープの収納部において、成形時のゆがみ、収縮、シートの偏肉等によって載置棚の表面の平滑性が損なわれると、これが収納したパッケージの傾きや、浮き上がり等による収納部内のがたつきの原因となっていた。
これを回避するためには、パッケージ4と載置棚3の接触面積を減らすことが考えられるが、接触面積が少ないと逆にパッケージの安定した収納が難しくなる。
以上のことを考え、収納したパッケージ4を載置棚3の辺縁部で線接触により支えることで、載置棚3の平滑性に起因するパッケージのがたつきを防止することが可能となる。
【0009】
さらに、収納部側壁2と載置棚3の表面との角度θを、θ<90゜にすることにより、収納部側壁2と載置棚3との境をなすアール部Aが、パッケージ4より下方に位置することになるため、パッケージ4の下端縁がアール部Aに乗り上げて傾くことはなく、収納部側壁2への接触が可能となり、収納部内におけるパッケージのがたつき防止と、パッケージの位置規制が容易となる。
【0010】
この場合、図1(c)に示すように、アール部の上縁α、載置棚3とパッケージ4の接点β及びパッケージ4の下端縁と収納部側壁2の接点γを結ぶと直角三角形を形成することになるので、辺αβ、辺αγの寸法は、角度θと実効載置棚寸法であるβγの寸法が決定すれば自動的に決まる。このことから、成形金型の載置棚の構造は容易に設計することができる。
【0011】
本発明のキャリアテープでは、載置棚3はフラットな構造でよいため、プレスの際、シートを延伸して収納部側壁2と載置棚3との境に溝を設ける従来の構造と比較してシートの肉厚を厚くすることができるので強度的に有利となり、また従来の溝構造と比較して成形金型による加工が容易であるという利点を有する。さらに、収納部側壁2と載置棚3との角度θは、85゜以上であると、収納部側壁2と載置棚3の境をなすアール部にパッケージ4の下端縁が接近してアール部の上縁にパッケージが乗り上げるおそれが生じ、70゜未満であると実効載置棚の寸法が不必要に長くなり過ぎて、シートの肉厚が薄くなり強度的に弱くなるため、70〜85゜が好ましい。
【0012】
角度とシートの長さとの関係について、さらに詳細に説明すると、実効載置棚寸法βγと、載置棚と収納部側壁との角度θから、載置棚寸法αβ、側壁の一部であるαγには次の関係が存在する。
αβ=βγ/sinθ
αγ=βγ/tanθ
よつて、成形後のγαβの長さは

Figure 0003805441
このことから、載置棚と収納部側壁との角度θを任意の角度に設定した場合、θが90゜の場合のγαβの長さの((1+cosθ)/sinθ)倍になることがわかる。
これは成形後の肉厚に影響する項目であり、具体的にはθ=70゜の場合、約1.43倍であり、θ=65゜で1.57倍となる。1.5倍を越えると肉厚的に薄くなり強度的に弱くなると考えられる。それ故、θの値としては、70゜<θ<85゜が好ましいといえる。
【0013】
次に、請求項2の発明として、図2〜図4に示すように、収納部側壁2の少なくとも一箇所に、内側に突出する突起部4を設けることにより、パッケージの収納位置が突起部4より内側となるため、パッケージの収納部内での位置規制が容易となり、パッケージの傾き、がたつきが防止される。
突起部と載置棚の寸法の関係としては、突起部4の先端から載置棚3の端縁までの寸法がパッケージを載せるための寸法となり、載置棚3の幅より実効寸法は小さくなる。このことはμBGAのような載置棚が狭くて済む場合でも、実効寸法より載置棚を広く設計する必要があるため、棚構造を加工する場合に技術的に容易になるという利点も存在する。
【0014】
突起部4の大きさは、パッケージの位置を規制するのに十分であればよく、通常、収納部側壁から内側に1〜3mm突出するように形成される。また、突起部4の形状としては、パッケージ側面と面ではなく、線あるいは点状で接触するような構造が好ましいが、図2〜図4に示すような形状の突条に形成して面接触する構造としても、パッケージとの接触面積を小さくすることによって接触部の平滑性の問題を回避することができる。
さらに、突起部4と載置棚3との境にアールが生じるような形状の場合、図4に示すように突起部4と載置棚3を分割することによって、突起部を形成した部分を完全にオープンな構造にしてアール部を逃がすことが出来る。
【0015】
【実施例】
[実施例1]
パッケージの寸法が、27mm×27mm±O.2mm、フランジ代の幅が、2.5mm±O.1mmのBGAパッケージを収納するキャリアテープとして、図1と同様なキャリアテープを作製した。
なお、載置棚3の実効寸法を1.5mmとし、また、収納部側壁2と載置棚3の表面との角度θは、80゜にした。
【0016】
[実施例2]
次に、実施例1に準じたキャリアテープであって、開口部の寸法を29mm×29mmとし、載置棚の寸法を2.5mm、突起部の突出長さを1mmとするキャリアテープを作製した。
【0017】
[実施例3]
さらに、上記二つの特徴を取り入れた構造としてθ=80゜、突出長さが1mmの突起部を有するキャリアテープを作製した。開口部の寸法は、実施例2に準じた設計とした。
これら三種類のキャリアテープを用いてBGAパッケージを収納したところ、収納部内でのBGAパッケージのがたつき及びアール部への乗り上げによる傾きは皆無であつた。
【0018】
【発明の効果】
本発明によるキャリアテープのパッケージにエリア型パッケージを収納しても、収納状態におけるパッケージのがたつきが防止されるためキャリアテープ内でのパッケージの破損を防止することができる。
また、収納部側壁の突起部により、キャリアテープへの収納状態において位置規制が行われるため、実装時におけるパッケージの位置決めが容易に行え、実装不良を無くすことができる。
【図面の簡単な説明】
【図1】図1は、本発明のキャリアテープの一例の図であり、(a)は収納部を示す平面図、(b)はそのX−X線の断面図、(c)は、その一部拡大断面図である。
【図2】(a)は、本発明のキャリアテープの一例の収納部を示す平面図、(b)は、その斜視図である。
【図3】(a)は、本発明のキャリアテープの一例の収納部を示す平面図、(b)は、その斜視図である。
【図4】(a)は、本発明のキャリアテープの一例の収納部を示す平面図、(b)は、その斜視図である。
【符号の説明】
1 キャリアテープ
2 収納部側壁
3 載置棚
4 突起部
5 パッケージ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a BGA (ball grid array) package (an LSI package in which solder balls are arranged in a lattice pattern on the lower surface) classified as an area type package among electronic components, and an LSI called a CSP (chip size package). Among chip-sized packages, transport and store μBGA (micro ball grid array) packages with solder balls arranged in a grid at the bottom, bump chips with bumps for wiring connection formed on LSI chips, and bare chips And a carrier tape useful for mounting.
[0002]
[Prior art]
As a carrier tape for storing a BGA package, the applicant has previously proposed a carrier tape having a mounting shelf in the storage portion (Japanese Patent Laid-Open No. 8-11930). In order to avoid the conventional inconvenience that the stored BGA package leans on the rounded portion that forms the boundary between the storage unit side wall and the mounting shelf, this carrier tape is placed at the boundary between the storage unit side wall and the mounting shelf. A groove is formed so that the rounded portion is positioned in the groove.
[0003]
[Problems to be solved by the invention]
However, when a package with a small flange portion such as a μBGA package is to be accommodated in the proposed carrier tape, the width of the mounting shelf is inevitably narrow due to the presence of the groove. It is technically very difficult to process such a narrow mounting shelf and groove using the prior art. In addition, due to the grooves, the thickness of the mounting shelf after processing becomes thinner than that of the mounting shelf without the groove, and there is a disadvantage that the strength is weakened.
[0004]
Even when the mounting shelf has a sufficient width, with the carrier tape structure, when the package is stored, the flange portion of the package and the mounting shelf are in surface contact with each other. If there is a factor that impairs the smoothness of the surface of the shelf, the placement shelf will be uneven, which will be a cause of rattling due to tilting or lifting of the stored BGA package.
[0005]
The present invention solves the above-mentioned problems, prevents rattling of an area type package (hereinafter simply referred to as a package) such as a stored BGA package, and the mounting shelf is technically processed. It is an object to provide a carrier tape that is easy and has sufficient strength.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the carrier tape according to claim 1, the angle θ between the storage portion side wall and the mounting shelf surface is set to θ <90 °.
As a result, the flange portion of the stored package is held in line contact with the mounting shelf, and the rattling of the package due to the smoothness of the mounting shelf is prevented, and the boundary between the storage portion side wall and the mounting shelf is prevented. The inconvenience that the package touches and rides on the rounded portion is prevented.
Further, in the carrier tape according to the second aspect, one or more protrusions projecting inward are provided on the side wall of the carrier portion of the carrier tape to facilitate positioning of the package in the storage portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
1A and 1B are views of an example of the carrier tape of the present invention, in which FIG. 1A is a partial plan view showing a storage portion, FIG. 1B is a sectional view taken along line XX, and FIG. It is sectional drawing. 2-4 is a figure which shows an example of the accommodating part of the carrier tape of this invention, respectively, (a) is the top view, (b) is a perspective view.
[0008]
First, as shown in FIG. 1 (c), the invention of claim 1 stores the carrier tape 1 by setting the angle θ between the storage portion side wall 2 and the surface of the mounting shelf 3 to θ <90 °. The contact portion between the package 4 and the mounting shelf 3 is changed from a conventional surface contact to a line contact.
In the conventional carrier tape storage part, if the smoothness of the surface of the mounting shelf is impaired due to distortion, shrinkage, uneven thickness of the sheet, etc., the inside of the storage part due to the inclination of the stored package or lift It was a cause of rattling.
In order to avoid this, it is conceivable to reduce the contact area between the package 4 and the mounting shelf 3. However, if the contact area is small, it is difficult to stably store the package.
Considering the above, by supporting the stored package 4 by line contact at the edge of the mounting shelf 3, it becomes possible to prevent the shakiness of the package due to the smoothness of the mounting shelf 3. .
[0009]
Further, the angle θ between the storage unit side wall 2 and the surface of the mounting shelf 3 is set to θ <90 °, whereby the rounded portion A that forms the boundary between the storage unit side wall 2 and the mounting shelf 3 is Since the lower end edge of the package 4 does not run over the rounded portion A and is inclined, the package 4 can be contacted with the storage unit side wall 2 to prevent the package from rattling in the storage unit. Position regulation becomes easy.
[0010]
In this case, as shown in FIG. 1C, a right triangle is formed by connecting the upper edge α of the rounded portion, the contact β of the mounting shelf 3 and the package 4, and the lower end edge of the package 4 and the contact γ of the storage portion side wall 2. Therefore, the dimensions of the side αβ and the side αγ are automatically determined if the angle θ and the size of βγ which is the effective placement shelf size are determined. From this, the structure of the mounting shelf for the molding die can be easily designed.
[0011]
In the carrier tape of the present invention, the mounting shelf 3 may have a flat structure, and therefore, compared with a conventional structure in which a sheet is stretched and a groove is formed at the boundary between the storage unit side wall 2 and the mounting shelf 3 during pressing. Thus, the thickness of the sheet can be increased, which is advantageous in terms of strength, and has an advantage that processing by a molding die is easy as compared with a conventional groove structure. Furthermore, if the angle θ between the storage portion side wall 2 and the mounting shelf 3 is 85 ° or more, the lower edge of the package 4 approaches the rounded portion that forms the boundary between the storage portion side wall 2 and the mounting shelf 3. If the angle is less than 70 °, the size of the effective mounting shelf becomes unnecessarily long, and the thickness of the sheet becomes thin and the strength becomes weak. ° is preferred.
[0012]
The relationship between the angle and the sheet length will be described in more detail. From the effective mounting shelf size βγ and the angle θ between the mounting shelf and the storage unit side wall, the mounting shelf size αβ and αγ that is a part of the side wall Has the following relationship:
αβ = βγ / sinθ
αγ = βγ / tanθ
Therefore, the length of γαβ after molding is
Figure 0003805441
From this, it can be seen that when the angle θ between the mounting shelf and the storage portion side wall is set to an arbitrary angle, it becomes ((1 + cos θ) / sin θ) times the length of γαβ when θ is 90 °.
This is an item affecting the thickness after molding. Specifically, when θ = 70 °, it is about 1.43 times, and when θ = 65 °, it is 1.57 times. If it exceeds 1.5 times, it is considered that the thickness becomes thinner and the strength becomes weaker. Therefore, it can be said that the value of θ is preferably 70 ° <θ <85 °.
[0013]
Next, as a second aspect of the invention, as shown in FIGS. 2 to 4, at least one location on the side wall 2 of the storage unit is provided with a protrusion 4 that protrudes inward, so that the package is stored in the protrusion 4. Since it is on the inner side, it is easy to regulate the position of the package in the storage unit, and the inclination and backlash of the package are prevented.
As for the relationship between the dimensions of the protrusion and the mounting shelf, the dimension from the tip of the protrusion 4 to the edge of the mounting shelf 3 is the dimension for mounting the package, and the effective dimension is smaller than the width of the mounting shelf 3. . This means that even if the mounting shelf such as μBGA is narrow, it is necessary to design the mounting shelf wider than the effective dimension, so there is an advantage that it becomes technically easy when processing the shelf structure. .
[0014]
The size of the protrusion 4 is sufficient to regulate the position of the package, and is usually formed so as to protrude 1 to 3 mm inward from the side wall of the storage unit. In addition, the shape of the protrusion 4 is preferably a structure that makes contact with a line or a dot instead of a surface and a surface of the package. However, the protrusion 4 is formed on a protrusion having a shape as shown in FIGS. Even with this structure, it is possible to avoid the problem of smoothness of the contact portion by reducing the contact area with the package.
Furthermore, in the case of a shape in which a round is generated at the boundary between the protruding portion 4 and the mounting shelf 3, by dividing the protruding portion 4 and the mounting shelf 3 as shown in FIG. It is possible to escape the rounded part with a completely open structure.
[0015]
【Example】
[Example 1]
The package dimensions are 27 mm × 27 mm ± O. 2 mm, flange width is 2.5 mm ± O. A carrier tape similar to that shown in FIG. 1 was prepared as a carrier tape for housing a 1 mm BGA package.
In addition, the effective dimension of the mounting shelf 3 was 1.5 mm, and the angle θ between the storage unit side wall 2 and the surface of the mounting shelf 3 was 80 °.
[0016]
[Example 2]
Next, a carrier tape according to Example 1 was manufactured, in which the size of the opening was 29 mm × 29 mm, the size of the mounting shelf was 2.5 mm, and the protruding length of the protrusion was 1 mm. .
[0017]
[Example 3]
Further, a carrier tape having a protrusion portion with θ = 80 ° and a protrusion length of 1 mm as a structure incorporating the above two features was produced. The size of the opening was designed according to Example 2.
When these three types of carrier tapes were used to store the BGA package, there was no tilting due to the backlash of the BGA package in the storage portion and riding on the rounded portion.
[0018]
【The invention's effect】
Even if the area type package is stored in the carrier tape package according to the present invention, it is possible to prevent the package from being damaged in the carrier tape since the backlash of the package in the stored state is prevented.
Further, since the position of the storage portion side wall is regulated by the protrusion on the side wall of the storage portion, the package can be easily positioned at the time of mounting, and mounting defects can be eliminated.
[Brief description of the drawings]
FIG. 1 is a diagram of an example of a carrier tape of the present invention, (a) is a plan view showing a storage portion, (b) is a sectional view taken along line XX, and (c) is a diagram thereof. It is a partially expanded sectional view.
FIG. 2A is a plan view showing a storage portion of an example of the carrier tape of the present invention, and FIG. 2B is a perspective view thereof.
FIG. 3A is a plan view showing a storage portion of an example of the carrier tape of the present invention, and FIG. 3B is a perspective view thereof.
4A is a plan view showing a storage portion of an example of the carrier tape of the present invention, and FIG. 4B is a perspective view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Carrier tape 2 Storage part side wall 3 Mounting shelf 4 Protrusion part 5 Package

Claims (2)

エリア型パッケージを収納するために、収納部側壁に沿って底面より一定の高さを保った載置棚構造を有するキャリアテープであって、収納部側壁と載置棚表面との角度θが、θ<90゜の構造を有することを特徴とするキャリアテープ。In order to store the area type package, it is a carrier tape having a mounting shelf structure that maintains a constant height from the bottom surface along the storage unit side wall, and an angle θ between the storage unit side wall and the mounting shelf surface is A carrier tape having a structure of θ <90 °. 収納部側壁の少なくとも一箇所に、内側に突出する突起部を有することを特徴とする請求項1に記載のキャリアテープ。The carrier tape according to claim 1, wherein the carrier tape has a protruding portion protruding inward at at least one location of the storage portion side wall.
JP27606896A 1996-10-18 1996-10-18 Carrier tape Expired - Lifetime JP3805441B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27606896A JP3805441B2 (en) 1996-10-18 1996-10-18 Carrier tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27606896A JP3805441B2 (en) 1996-10-18 1996-10-18 Carrier tape

Publications (2)

Publication Number Publication Date
JPH10120075A JPH10120075A (en) 1998-05-12
JP3805441B2 true JP3805441B2 (en) 2006-08-02

Family

ID=17564364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27606896A Expired - Lifetime JP3805441B2 (en) 1996-10-18 1996-10-18 Carrier tape

Country Status (1)

Country Link
JP (1) JP3805441B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5579108B2 (en) 2011-03-16 2014-08-27 株式会社東芝 Semiconductor device
CN105870293B (en) 2015-01-30 2019-12-13 日亚化学工业株式会社 Carrier tape and package

Also Published As

Publication number Publication date
JPH10120075A (en) 1998-05-12

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