JP4199801B2 - 共振周波数タグ、および共振周波数タグの制御方法 - Google Patents
共振周波数タグ、および共振周波数タグの制御方法 Download PDFInfo
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Description
F=1/(2π√(L・C))
に従ってインダクタンス値およびキャパシタンス値により定められる。共振回路のインダクタンスを一定に維持してキャパシタンスを増加させると、周波数は減少し、インダクタンスを一定に維持してキャパシタンスを減少させると、共振周波数は増加する。第1導体パターン118上の第2導体パターン120の接着位置を正確に選択することにより、共振回路の共振周波数は、非常に厳密な許容範囲で所定の目標共振周波数に一致するよう、正確に制御し、または調整することが可能となる。
所定周波数または所定周波数の僅かな許容範囲内で共振する、共振周波数タグの作成方法の提供に加えて、本発明は、周波数領域内で、各々が異なる周波数で共振する、一連の他とは異なる別個の共振周波数タグを作成する方法も含んでいる。上記の説明により明確に理解可能なように、共振周波数タグの周波数は、タグのキャパシタンスとインダクタンスの逆関数であり、すでに説明した式により規定される。また、上述したように、図3に示した共振周波数タグでは、インダクタンスが一定であり、第1導体パターン118の誘導コイル126のサイズおよび他の特性により決定される。このようにして、図3のタグ110の周波数は、容量要素のキャパシタンスを規定する、第2導体パターン120の位置により規定されるタグのキャパシタンス、特に、導体ランド130により重なり合う導体ランド128の部分により決定される。第2導体パターン120、および特に導体ランド130が、第1導体ランド128の第1終端128aに向かって移動するにつれ、共振周波数回路のキャパシタンスは増加し、それにより、周波数は低くなり、逆もまた同様である。
Claims (24)
- (a)誘導要素と第1ランドとを含む第1導体パターンを形成するステップであって、第1ランドは、誘導要素の1つの終端に接続された第1終端および所定の距離だけ第1終端から離れた第2終端を有する、ステップと、
(b)所定の幅を有する第2ランドおよびリンク要素を含む第2導体パターンを別個に形成するステップと、
(c)誘導要素と共に共振回路を形成する、第1の所定キャパシタンスを有する容量要素のプレートを構築するために、誘電体を介在させて、第2ランドが第1ランドの少なくとも一部分と重なるよう、第2導体パターンを第1導体パターンの近傍の第1所定位置へ配置するステップと、
(d)共振回路の共振周波数を測定し、測定周波数を所定周波数と比較するステップと、
(e)共振周波数が選択許容範囲内で所定周波数に合致しないなら、第1ランドの長さに沿って第2ランドが移動するよう、第2導体パターンを動かし、それにより容量要素のキャパシタンスを変更するステップと、
(f)ステップ(d)、(e)を、合致するまで繰り返すステップと、
(g)第1導体パターンへ第2導体パターンを固定するステップと
を含む、所定周波数で共振する共振周波数タグの作成方法。 - 第1ランドが、一方の終端から他方の終端へ、長さに沿って移動するにつれ、減少する幅を有している、請求項1に記載の方法。
- 第2ランドが、概して長方形であり、第1ランドの最大幅を超える長さを有している、請求項1に記載の方法。
- 第2導体パターンが、接着剤およびホットプレス法のうちの1つにより、第1導体パターンに固定される、請求項1に記載の方法。
- 第2導体パターンが、圧力を加えることにより第1導体パターンに固定され、加えられる圧力の量が、タグの共振周波数を制御するために変更される、請求項4に記載の方法。
- いったん形成された第2導体パターンが、初期にキャリヤーシート上に保持されている、請求項1に記載の方法。
- 第2導体パターンを第1導体パターンへ固定する前に第2ランドと第1ランドとの間に配置される誘電体層を、第2導体パターンが含んでいる、請求項1に記載の方法。
- リンク要素が、第2ランドへ接続された第1セクションおよび第2セクションを含み、リンク要素の第1および第2セクションが、所定の最小幅の隙間だけ距離を置いて離れており、さらに、少なくとも、リンク要素の第1セクションへ電気的に接続した第1リードと、リンク要素の第2セクションへ電気的に接続した第2リードを含む集積回路を含んでいる、請求項1に記載の方法。
- 集積回路が、リンク要素の第1セクションおよび第2セクションの一方へ固定されている、請求項8に記載の方法。
- (a)一連の第1導体パターンを形成するステップであって、第1導体パターンは全て実質的に同じであり、各第1導体パターンは、誘導要素ならびに第1ランドを含み、第1ランドは誘導要素の1つの終端に接続された第1終端、および第1終端から所定の距離だけ離れた第2終端を含んでいるステップと、
(b)別個に、一連の第2導体パターンを形成するステップであって、第2導体パターンは、全て実質的に同じであり、さらに、各第2導体パターンは、所定の幅を有する第2ランドおよびリンク要素を含む、ステップと、
(c)連続する第1タグの、第1所定キャパシタンスを有する容量要素のプレートを構築するために、誘電体を介在させて、第2ランドが第1ランドの少なくとも一部分と重なるよう、第2導体パターンを第1所定位置で連続する第1導体パターンへ固定するステップと、
(d)タグの共振周波数を測定して、測定周波数を所定周波数と比較するステップと、
(e)測定された共振周波数が選択許容範囲内で所定周波数に合致するなら、続くタグの、第1の所定キャパシタンスを有する容量要素のプレートを構築するために、誘電体を介在させて、第2ランドが第1ランドの少なくとも一部分と重なるよう、第2導体パターンをそれに続いて連続する第1導体パターンへ第1所定位置で固定し、その後、連続する残りに対して、ステップ(d)、(e)を繰り返し、さらに、共振周波数が選択許容範囲内で所定周波数に合致しないなら、続くタグの第2所定キャパシタンスを有する容量要素のプレートを構築するために、誘電体を介在させて、第2ランドが第1ランドの少なくとも一部分と重なるよう、第1所定位置とは異なる第2所定位置で、第2導体パターンをそれに続いて連続する第1導体パターンへ固定し、その後、連続する残りに対して、ステップ(d)、(e)を繰り返すステップと
を含む、実質的に同じ所定周波数で各々が共振する、一連の共振周波数タグの作成方法。 - 各第1ランドが、一方の終端から他方の終端へ、長さに沿って移動するにつれ、減少する幅を有する、請求項10に記載の方法。
- 各第2ランドが概して長方形であり、第1ランドの最大幅を超える長さを有する、請求項11に記載の方法。
- 各第2導体パターンが、接着剤およびホットプレス法のうちの1つにより、第1導体パターンに固定される、請求項10に記載の方法。
- 各第2導体パターンが、圧力を加えることにより対応する第1導体パターンに固定され、加えられる圧力の量が、各タグの共振周波数を制御するために変更される、請求項13に記載の方法。
- いったん形成された第2導体パターンが、初期にキャリヤーシート上に保持されている、請求項10に記載の方法。
- 第2導体パターンを対応する第1導体パターンへ固定する前に、第2ランドと第1ランドとの間に配置される誘電体層を、各第2導体パターンが含んでいる、請求項10に記載の方法。
- 各リンク要素が、第2ランドへ接続された第1セクションおよび第2セクションを含み、各リンク要素の第1セクションおよび第2セクションが、所定の最小幅のギャップだけ距離を置いて離れており、さらに、少なくとも、各リンク要素の第1セクションへ電気的に接続した第1リードと、リンク要素の第2セクションへ電気的に接続した第2リードを含む集積回路を含んでいる、請求項10に記載の方法。
- 集積回路が、各リンク要素の第1セクションおよび第2セクションの一方へ固定されている、請求項17に記載の方法。
- 一連のN個の共振周波数タグの作成方法であって、Nは1より大きな整数であり、N個のタグの各々は、連続した他のあらゆるタグの共振周波数と、少なくとも所定の最小周波数範囲だけ異なる共振周波数を有しており、前記方法は、
(a)N個の第1導体パターンを形成するステップであって、第1導体パターンは全て実質的に同じであり、各第1導体パターンは、誘導要素ならびに第1ランドを含み、第1ランドの第1終端は誘導要素の1つの終端に接続され、第1ランドの第2終端は第1終端から所定の距離だけ離れている、ステップと、
(b)別個に、N個の第2導体パターンを形成するステップであって、第2導体パターンは、全て実質的に同じであり、各第2導体パターンは、所定の幅を有する第2ランドおよびリンク要素を含む、ステップと、
(c)各共振周波数タグに対する容量要素のプレートを構築するために、誘電体を介在させて、各第2導体パターンの第2ランドが対応する第1導体パターンの第1ランドの一部分と重なるよう、第2導体パターンを、ある位置で第1導体パターンの各々へ連続して固定し、対応する第1導体パターンの第1ランドに対する各第2導体パターンの位置、したがって、第1ランドに各第2ランドが重なる量が、連続する共振周波数タグの各々で異なっており、各共振周波数タグが連続する他のあらゆる共振周波数タグと異なる周波数で共振するよう、各共振周波数タグの容量要素のキャパシタンスが、連続する他のあらゆる共振周波数タグの容量要素のキャパシタンスと、少なくとも最小値だけ異なるステップと
を含む、一連のN個の共振周波数タグの作成方法。 - 各第1ランドが、一方の終端から他方の終端へ、長さに沿って移動するにつれ、減少する幅を有する、請求項19に記載の方法。
- 各第2導体パターンが、接着剤およびホットプレス法のうちの1つにより、対応する第1導体パターンに固定される、請求項19に記載の方法。
- 各第2導体パターンが、圧力を加えることにより対応する第1導体パターンに固定され、加えられる圧力の量が、各タグの共振周波数を制御するために変更される、請求項21に記載の方法。
- いったん形成された第2導体パターンが、初期にキャリヤーシート上に保持されている、請求項19に記載の方法。
- 第2導体パターンを対応する基板へ固定する前に、第2ランドと第1ランドとの間に配置される誘電体層を、第2導体パターンが含んでいる、請求項19に記載の方法。
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