201244187 六、發明說明： 【發明所屬之技術領域】 本發明係關於具有由液晶聚酯所構成的絕緣層 用基板。又，本發明爲關於使用此LED用基板 LED封裝。 【先前技術】 對於LED (發光一極體）用基板之絕緣層，爲 受在藉由焊接來將LED元件進行組裝之際或LED 之高溫’要求著高的耐熱性，又，即使是高溫爲了 不易變化，要求著低的線膨脹率，更，爲了容易散 求著高的導熱率。由如此般之觀點，作爲LED用 絕緣層之材料，檢討著使用液晶聚酯，例如，於專 1中揭示著’在作爲LED用基板之絕緣層之材料 一種液晶聚酯’其係具有30〜45莫耳％之來自於指 香族羥基羧酸之重複單位、27.5莫耳％之來自於指 香族二竣酸之重複單位、及27.5莫耳％之來自於指 香族二醇、芳香族羥胺或芳香族二胺之重複單位； 示爲使用具有35莫耳％之來自於6 -羥基-2-萘甲酸 單位、32.5莫耳％之來自於異酞酸之重複單位、及 耳％之來自於P-胺基酚之重複單位之液晶聚酯。 〔先前技術文獻〕 〔專利文獻〕 [專利文獻1]特開2010-114427號公報 之 LED 所成的 了能承 發光時 使尺寸 熱，要 基板之 利文獻 係使用 定的芳 定的芳 定的芳 具體表 之重複 32.5 莫 -5- 201244187 【發明內容】 〔發明所欲解決的課題〕 如專利文獻1所揭示，只要是使用液晶聚酯來作爲 LED用基板之絕緣層之材料，其絕緣層會變成高耐熱性、 低線膨脹率、高導熱率者，就長期可靠提昇之觀點而言， 除了此等性能外，要求著水蒸氣阻隔性。在此，本發明之 目的爲提供一種由液晶聚酯所構成，並具有優異水蒸氣阻 隔性之絕緣層之LED用基板。 〔解決課題之手段〕 爲了達成前述目的，本發明爲提供一種LED用基板 ’其係將導體層設置於由液晶聚酯所構成的絕緣層之至少 一側之面上所成者，其中，前述液晶聚酯爲具有下述式（ 1)所示的重複單位、下述式（2)所示的重複單位、下述 式（3)所示的重複單位，且含有2,6-伸萘基之重複單位 之含有量，相對於全重複單位之合計量爲40莫耳％以上， -O-Ar'-CO- ⑴ -C0-Ar2-C0- (2) -0-Ar3-0- (3) ( Ar1示爲2,6-伸萘基、 1,4 -伸苯基或 4,4’-伸聯苯基。Ar: 及 Ar3分別獨立示爲2,6 •伸萘基、 1,4- -伸苯基、1,3 -伸苯基 或 4,4’-伸聯苯基。位於 A r 1、Ar2 或 Ar3所示的前述基之 201244187 氫原子’可分別獨立被鹵素原子、烷基或芳基所取代）。 又’本發明爲提供一種LED用基板，其係將導體層 設置於由液晶聚酯所構成的絕緣層之至少一側之面上所成 者’其中’前述液晶聚酯在溫度40 °C及相對濕度90%測定 時，水蒸氣透過度爲0.005g/m2 . 24h以下。 更’本發明爲提供一種LED用基板，其係將導體層 設置於由液晶聚酯所構成的絕緣層之至少一側之面上所成 者’其中’前述液晶聚酯爲製成厚度50μιη之薄膜時，在 溫度40 °C及相對濕度90%測定時，水蒸氣透過度爲 0.005g/m2 · 24h 以下。 此外，本發明爲提供一種LED封裝，其係將LED元 件配置於如前述中任何一種的LED用基板之前述導體層 之上所成者。 〔發明效果〕 本發明之LED用基板爲具有優異水蒸氣阻隔性之絕 緣層，藉由使用此可得到可靠高的LED封裝。 〔實施發明的最佳型態〕 構成本發明之LED用基板的絕緣層之液晶聚酯，於 熔融時爲展示光學異向性之聚酯，適合爲具有下述式（1 )所示的重複單位（以下有稱爲重複單位（1)之情形） 、下述式（2)所示的重複單位（以下有稱爲重複單位（2 )之情形）、下述式（3)所示的重複單位（以下有稱爲 201244187 重複單位（3 )之情形以下）者。 -O-Ar'-CO- (1) -CO-Ar2-CO- (2) -Ο-Δγ^-Ο- (3) (Ar1示爲2,6-伸萘基、 1，4·伸苯基或4,4’-伸聯苯基。a 及Ar3分別獨立示爲2,6-伸萘基、1,4-伸苯基、l，3-伸苯基 或4,4’-伸聯苯基。位於Ar1、Ar2或Ar3所示的前述基之 氫原子’可分別獨立被鹵素原子、碳數1〜10之烷基或碳 數6〜20之芳基所取代）。 作爲前述鹵素原子，可舉例氟原子、氯原子、溴原子 及碘原子。作爲前述烷基之例，舉例如甲基、乙基、η-丙 基、異丙基、η-丁基、異丁基、s-丁基' t-丁基、η-己基 、2-乙基己基、η-辛基及η-癸基，其碳數通常爲丨〜10。 作爲前述芳基之例，舉例如苯基、〇-甲苯基、m-甲苯基、 p-甲苯基、1-萘基及2-萘基，其碳數通常爲6〜20。若前 述氫原子爲以此等之基所取代時，其數量，以 Ar1、Ar2 或Ar3所示的前述基之每單位，通常分別獨立爲2個以下 ，較佳爲1個以下。 重複單位（1)爲來自於指定的芳香族羥基羧酸之重 複單位。作爲重複單位（1 )，以Ar1爲2,6·伸萘基者， 即，來自於6-羥基-2-萘甲酸之重複單位爲佳》 重複單位（2)爲來自於指定的芳香族二羧酸之重複 單位。作爲重複單位（2 )，以Ar2爲2,6-伸萘基者，即 ，來自於2,6-萘二羧酸之重複單位，及Ar2爲1，4-伸苯基 -8- 201244187 者，即，來自於對酞酸之重複單位爲佳。 重複單位（3)爲來自於指定的芳香族二醇之重複單 位。作爲重複單位（3 )，以Ar3爲1，4-伸苯基者，即， 來自於氫醌之重複單位，及Ar3爲4,4’-伸聯苯基者，即， 來自於4,4’-二羥基聯苯之重複單位爲佳。 液晶聚酯中，含有2,6-伸萘基之重複單位之含有量， 即，Ar1爲2,6-伸萘基之重複單位（1 ) 、Ar2爲2,6-伸萘 基之重複單位（2 )、及Ar3爲2,6-伸萘基之重複單位（3 )之合計含有量’相對於全重複單位之合計量（將構成液 晶聚酯的各重複單位之質量，藉由除以各重複單位之式量 ’求得各重複單位之物質量當量（莫耳），且將該等予以 合計之値），爲40莫耳％以上。藉由將具有指定的重複單 位組成之液晶聚酯進行薄膜化，可得到優異水蒸氣阻隔性 之液晶聚酯薄膜。此2,6-伸萘基之含有量，較佳爲50莫 耳％以上、更佳爲6 0莫耳％以上、又更佳爲7 〇莫耳％以上 〇 又’液晶聚酯中’重複單位（1)之含有量，相對於 全重複單位之合計量’較佳爲30〜80莫耳％、更佳爲40 〜70莫耳％、又更佳爲45〜65莫耳％ :重複單位（2)之 含有量’相對於全重複單位之合計量，較佳爲1〇〜35莫 耳％、更佳爲15〜30莫耳％、又更佳爲17.5〜27·5莫耳。/〇 :重複單位（3)之含有量，相對於全重複單位之合計量 ，較佳爲1 〇〜3 5莫耳％、更佳爲丨5〜3 〇莫耳％、又更佳 爲17.5〜27.5莫耳％。如此般具有指定的重複單位組成之 -9- 201244187 液晶聚酯，耐熱性及成型性之平衡爲優異。尙，重複單位 (2)之含有量及重複單位（3)之含有量，以實質上相同 者爲佳。又，液晶聚酯，視所需，可具有重複單位（i ) 〜（3)以外之重複單位，惟，其含有量相對於全重複單 位之合計量，通常爲1 0莫耳％以下、較佳爲5莫耳％以下 〇 耐熱性或熔融張力爲高的液晶聚酯之典型例，相對於 全重複單位之合計量，Ar1爲2,6-伸萘基之重複單位（1 ) ，即’具有來自於6-羥基-2-萘甲酸之重複單位，較佳爲 40〜74.8莫耳％、更佳爲40〜64.5莫耳％、又更佳爲50〜 58莫耳％; Ar2爲2，6 -伸萘基之重複單位（2)，即，具有 來自於2,6 -萘二羧酸之重複單位，較佳爲12.5〜30莫耳％ 、更佳爲17.5〜30莫耳％、又更佳爲20〜25莫耳％; Ar2 爲1,4 -伸苯基之重複單位（2)，即，具有來自於對酞酸 之重複單位’較佳爲0.2〜15莫耳％、更佳爲〇·5〜12莫 耳％、又更佳爲2〜1 0莫耳％ ; Ar3爲1，4-伸苯基之重複單 位（3 )，即’具有來自於氫醌之重複單位，較佳爲12.5 〜30莫耳％、更佳爲17.5〜30莫耳％、又更佳爲20〜25 莫耳％ :且’ Ar2爲2,6-伸萘基之重複單位（2)的含有量 ’相對於八1>爲2,6-伸萘基之重複單位（2)及八1'2爲1，4-伸苯基之重複單位（2 )的合計含有量，較佳爲〇.5倍莫 耳以上、更佳爲0 · 6倍莫耳以上。 液晶聚酯，係將賦予重複單位（1 )之單體（即，指 定的芳香族羥基羧酸）、賦予重複單位（2)之單體（即 -10- 201244187 ，指定的芳香族二羧酸）、及賦予重複單位（3)之單體 (即，指定的芳香族二醇），使含有2,6-伸萘基之單體之 合計量（即，6-羥基-2-萘甲酸、2，6-萘二羧酸及2,6-萘二 醇之合計量）相對於全單體之合計量，以成爲40莫耳％以 上般地，藉由進行聚合（縮聚合）而可予以製造。此時’ 芳香族羥基羧酸、芳香族二羧酸及芳香族二醇，可使用能 分別獨立地取代其一部份或全部而與其進行聚合之衍生物 。作爲與具有如芳香族羥基羧酸及芳香族二羧酸般之羧基 之化合物爲能進行聚合之衍生物之例，舉例如將羧基變換 爲烷氧基羰基或芳氧基羰基所成者、將羧基變換爲鹵甲醯 基（haloformyl )所成者、將羧基變換爲醯氧基羰基所成 者。作爲與具有如芳香族羥基羧酸及芳香族二醇般之羥基 之化合物爲能進行聚合之衍生物之例，舉例如將羥基予以 醯基化而變換成醯氧基所成者。 又，液晶聚酯，較佳爲使單體熔融聚合，並將所得到 的聚合物（預聚物）藉由固相聚合來予以製造。藉此，可 操作性良好地製造耐熱性或熔融張力爲高的液晶聚酯。熔 融聚合可在觸媒之存在下進行，作爲此觸媒之例，舉例如 乙酸鎂、乙酸亞錫、鈦酸四丁酯、乙酸鉛、乙酸鈉、乙酸 鉀、三氧化二銻等之金屬化合物或N，N-二甲基胺基吡啶、 N-甲基咪唑等之含氮雜環式化合物，較佳爲使用含氮雜環 式化合物。如此般所得到具有前述指定的重複單位組成之 液晶聚醋，水蒸氣阻隔性爲優異。 液晶聚酯，其流動開始溫度較佳爲2 8 (TC以上，更佳 201244187 爲290°C以上、又更佳爲295 °C以上，又， 下’較佳爲3 50°C以下。當流動開始溫度 或熔融張力越容易提昇，但過高時，爲了 ，成型時變得容易熱劣化。 尙’流動開始溫度亦被稱爲流溫或 temperature)，係使用具有內徑imm、長 毛細管流變計，在9.8MPa ( 100kg/cm2) °C /分鐘的昇溫速度將液晶聚酯之加熱熔 擠出之同時，當熔融黏度顯示爲4800Pa· 之溫度，係作爲液晶聚酯之分子量之標準 編，「液晶聚合物-合成♦成型.應用-」 CMC、1 987 年 6 月 5 日、ρ·95 )。 如此般所得到具有前述指定的重複單 酯，水蒸氣阻隔性爲優異，可作爲本發明 (TAB)用捲帶（carrier tape)之材料使 晶聚酯適合爲，製成厚度5 0 μηι之薄膜時 相對濕度90%測定時，水蒸氣透過度較佳 24h以下、更佳爲 0.01g/m2 . 24h以 0.005g/m2 . 24h 以下。 液晶聚酯中，視所需可摻雜其他成分 作爲其他成分之例，舉例如塡充材、液晶 性樹脂及添加劑。液晶聚酯所佔組成物全 爲80質量％以上、更佳爲90質量％以上。 作爲塡充材之例，可舉例碾磨玻璃纖彳 通常爲3 8 0 °C以 越高時，耐熱性 使熔融需要高溫 流動溫度（flow 1 Omm的噴嘴之 之荷重下，以4 融體從噴嘴予以 s ( 48,000 泊） (參考小出直之 ，股份有限公司 位組成之液晶聚 之捲帶自動接合 用。本發明之液 ，在溫度40°C及 :爲 0.005g/m2 · 下、又更佳爲 來作爲組成物。 聚酯以外的熱塑 體之比例，較佳 淮（milled glass -12- 201244187 fiber)、切碎玻璃纖維（chopped glass fiber)等之玻璃 纖維；鈦酸鉀晶鬚、氧化鋁晶鬚、硼酸鋁晶鬚、碳化矽晶 鬚、氮化矽晶鬚等之金屬或非金屬系晶鬚類；玻璃珠、中 空玻璃球、玻璃粉末、雲母、滑石、黏土、二氧化矽、氧 化鋁、鈦酸鉀' 矽灰石（wollastonite)、碳酸鈣（重質、 輕質、膠質等）、碳酸鎂、鹼性碳酸鎂、硫酸鈉、硫酸鈣 、硫酸鋇、亞硫酸鈣、氫氧化鋁、氫氧化鎂、氫氧化鈣、 矽酸鈣、矽砂、矽石 '石英、氧化鈦、氧化鋅、氧化鐵石 墨、鉬、石綿、二氧化矽氧化鋁纖維、氧化鋁纖維、石膏 纖維、碳纖維、碳黑、白碳（white carbon)、砂藻土、 膨潤土、絹雲母、希拉蘇（shir asu )及黑鉛，視所需亦可 使用此等之2種以上。之中又較佳爲使用玻璃纖維、雲母 、滑石及碳纖維。 塡充材，視所需地可爲已表面處理者，作爲此表面處 理劑之例，舉例如矽烷系偶合劑、鈦酸酯偶合劑、硼烷系 偶合劑等之反應性偶合劑、及高級脂肪酸、高級脂肪酸酯 、高級脂肪酸金屬鹽、碳氟化合物系界面活性劑等之潤滑 劑。 作爲液晶聚酯以外的熱塑性樹脂之例，舉例如聚碳酸 酯、聚醯胺、聚颯、聚苯硫醚、聚伸苯基醚、聚醚酮及聚 醚醯亞胺樹脂。 作爲添加劑之例，舉例如氟樹脂、金屬皂類等之脫模 改良劑、成核劑、抗氧化劑、安定劑、可塑劑、滑劑、防 著色劑、著色劑、紫外線吸收劑、防靜電劑、潤滑劑及難 -13- 201244187 燃劑。 藉由將如此般所得到的液晶聚酯或其組成物進行薄膜 化，可得到構成本發明之LED用基板之絕緣層的液晶聚 酯薄膜。作爲薄膜化之方法，例如，可舉例擠出成型法、 壓製成型法、溶液流涎法及射出成型法，較佳爲擠出成型 法。擠出成型法方面，例如，可例舉T形模頭（T-die ) 法或吹塑（inflation )法；作爲T形模頭法，可爲單軸延 伸或二軸延伸。 單軸延伸薄膜之延伸倍率（牽伸比），通常爲1.1〜 4〇’較佳爲10〜40、更佳爲15〜35。二軸薄膜之MD方 向（擠出方向）之延伸倍率，通常爲1.2〜40倍：二軸薄 膜之TD方向（垂直於擠出方向之方向）之延伸倍率，通 常爲1.2〜20倍。吹塑薄膜之MD方向之延伸倍率（垂落 (drawdown )比=氣泡拉取速度/樹脂吐出速度），通常爲 1.5〜50，較佳爲5〜30;吹塑薄膜之TD之延伸倍率（吹 脹（blowing)比=氣泡徑/環狀隙縫徑），通常爲1.5〜10 ’較佳爲2〜5。 液晶聚酯薄膜之厚度，較佳爲5〜ΙΟΟμιη、更佳爲10 〜75μηι、又更佳爲15〜75μπι。若過薄時，強度會變得不 足；若過厚時，撓性會變得不足。 如此般所得到的液晶聚酯薄膜，水蒸氣阻隔性爲優異 ’可作爲本發明之LED用基板的絕緣層使用。此液晶聚 酯薄膜’在溫度40 °C及相對濕度90%測定時，水蒸氣透過 度較佳爲0.005 g/m2· 24h以下，更佳爲〇.〇lg/m2· 24h以 -14- 201244187 下、又更佳爲0.005g/m2 · 24h以下。 尙’將液晶聚酯薄膜予以複數張層合，或將熱塑性樹 脂薄膜等其他薄膜層合至液晶聚酯薄膜而得到的層合薄膜 ’亦可作爲本發明之LED用基板的絕緣層使用。又，爲 了更提高液晶聚酯薄膜或前述層合薄膜之水蒸氣阻隔性， 設置水蒸氣阻隔層或設置其他的機能層而得到的層合薄膜 ’亦可作爲本發明之LED用基板的絕緣層使用。 水蒸氣阻隔層’爲設置於液晶聚酯薄膜之至少一側之 面上。若設置於液晶聚酯薄膜之單面上時，較佳爲設置於 液晶聚酯薄膜之背面（與配置有LED元件之面爲相反之 面）上。 作爲構成水蒸氣阻隔層之物質，較佳由鋁、矽、鈦、 鉻、鐵、鈷、鎳、銅、鋅、銀及金所成之群所選出的至少 1種元素之單體、氧化物、氮化物及氮氧化物，視所需可 使用此等之2種以上。 作爲水蒸氣阻隔層之形成方法，例如，可舉例蒸鍍法 、濺鍍法、離子電鍍法等之PVD法；電漿CVD法、熱 CVD法、雷射CVD法等之CVD法；及溶膠-凝膠法、鍍 敷法、塗佈法等之濕式法。又，亦可將另行調製，乃至取 得的箔貼合至液晶聚酯薄膜。 視所需，可對於液晶聚酯薄膜施以表面處理。作爲表 面處理之方法，例如，可舉例電暈放電處理、火燄處理、 濺鍍處理、溶劑處理、UV處理、電漿處理等。201244187 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a substrate for an insulating layer composed of a liquid crystal polyester. Further, the present invention relates to the use of the LED substrate package for LEDs. [Prior Art] The insulating layer of the substrate for the LED (light-emitting diode) is required to have high heat resistance when the LED element is assembled by soldering or the high temperature of the LED, and even high temperature is required. It is not easy to change, requires a low coefficient of linear expansion, and more, in order to easily achieve high thermal conductivity. From the viewpoint of the use of a liquid crystal polyester as a material for an insulating layer for LEDs, for example, a liquid crystal polyester which is a material for an insulating layer as a substrate for an LED has been disclosed in the first aspect. 45 mol% is derived from the repeating unit of the aromatic hydroxycarboxylic acid, 27.5 mol% of the repeating unit derived from the aromatic dicarboxylic acid, and 27.5 mol% of the aromatic diol, aromatic Repeating unit of hydroxylamine or aromatic diamine; shown as using 35 mol% of units derived from 6-hydroxy-2-naphthoic acid, 32.5 mol% of repeating units derived from isodecanoic acid, and A liquid crystal polyester of a repeating unit of P-aminophenol. [PRIOR ART DOCUMENT] [Patent Document 1] The LED of the Japanese Patent Laid-Open Publication No. 2010-114427 has a heat that can be used for illuminating light, and a document for which the substrate is used. Repetition of the specific table 32.5 Mo-5-201244187 [Problem to be Solved by the Invention] As disclosed in Patent Document 1, as long as the liquid crystal polyester is used as the material of the insulating layer of the substrate for LED, the insulating layer In the viewpoint of long-term reliability improvement, water vapor barrier properties are required in view of high heat resistance, low linear expansion ratio, and high thermal conductivity. Here, an object of the present invention is to provide a substrate for an LED which is composed of a liquid crystal polyester and which has an insulating layer having excellent water vapor barrier properties. [Means for Solving the Problems] In order to achieve the above object, the present invention provides a substrate for LEDs in which a conductor layer is provided on at least one surface of an insulating layer made of a liquid crystal polyester. The liquid crystal polyester is a repeating unit represented by the following formula (1), a repeating unit represented by the following formula (2), a repeating unit represented by the following formula (3), and contains a 2,6-anthranyl group. The content of the repeating unit is 40 mol% or more with respect to the total repeating unit, -O-Ar'-CO- (1) -C0-Ar2-C0- (2) -0-Ar3-0- (3 (Ar1 is shown as 2,6-anthranyl, 1,4-phenylene or 4,4'-biphenyl. Ar: and Ar3 are independently shown as 2,6 •naphthyl, 1,4 - -Phenyl, 1,3 -phenyl or 4,4'-biphenyl. The 201244187 hydrogen atom of the above-mentioned group represented by Ar 1 , Ar 2 or Ar 3 can be independently substituted by a halogen atom or an alkane Substituted by a aryl group or an aryl group). Further, the present invention provides a substrate for LEDs in which a conductor layer is provided on at least one side of an insulating layer made of a liquid crystal polyester, wherein the liquid crystal polyester is at a temperature of 40 ° C and When the relative humidity is 90%, the water vapor permeability is 0.005 g/m2. 24 hours or less. Further, the present invention provides a substrate for LEDs in which a conductor layer is provided on at least one side of an insulating layer made of a liquid crystal polyester, wherein the liquid crystal polyester is formed to have a thickness of 50 μm. In the case of a film, when the temperature is 40 ° C and the relative humidity is 90%, the water vapor permeability is 0.005 g/m 2 · 24 h or less. Furthermore, the present invention provides an LED package in which an LED element is disposed on the conductor layer of the substrate for LED of any of the foregoing. [Effect of the Invention] The substrate for LED of the present invention is an insulating layer having excellent water vapor barrier properties, and a highly reliable LED package can be obtained by using this. [Best Mode of Carrying Out the Invention] The liquid crystal polyester constituting the insulating layer of the substrate for LED of the present invention is a polyester exhibiting optical anisotropy at the time of melting, and is preferably a repeat having the following formula (1) The unit (hereinafter referred to as the case of the repeating unit (1)), the repeating unit shown by the following formula (2) (hereinafter referred to as the repeating unit (2)), and the repetition shown by the following formula (3) The unit (hereinafter referred to as the 201244187 repeat unit (3) or less). -O-Ar'-CO- (1) -CO-Ar2-CO- (2) -Ο-Δγ^-Ο- (3) (Ar1 is shown as 2,6-anthranyl, 1,4·benzene Or 4,4'-extended biphenyl. a and Ar3 are independently shown as 2,6-anthranyl, 1,4-phenylene, 1,3-phenyl or 4,4'-extension. Phenyl group. The hydrogen atom ' of the above-mentioned group represented by Ar1, Ar2 or Ar3 may be independently substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 20 carbon atoms). As the halogen atom, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom can be exemplified. As examples of the aforementioned alkyl group, for example, methyl, ethyl, η-propyl, isopropyl, η-butyl, isobutyl, s-butyl't-butyl, η-hexyl, 2-B The hexyl group, the η-octyl group and the η-fluorenyl group have a carbon number of usually 丨10. Examples of the aryl group include a phenyl group, a fluorenyl-tolyl group, an m-tolyl group, a p-tolyl group, a 1-naphthyl group and a 2-naphthyl group, and the carbon number thereof is usually from 6 to 20. When the above-mentioned hydrogen atom is substituted with such a group, the number of the above-mentioned groups represented by Ar1, Ar2 or Ar3 is usually independently 2 or less, preferably 1 or less. The repeating unit (1) is a repeating unit derived from the specified aromatic hydroxycarboxylic acid. As the repeating unit (1), Ar1 is 2,6·naphthyl, that is, the repeating unit derived from 6-hydroxy-2-naphthoic acid is preferred. The repeating unit (2) is derived from the designated aromatic two. Repeating unit of carboxylic acid. As repeating unit (2), Ar2 is 2,6-anthranyl group, that is, repeating unit derived from 2,6-naphthalenedicarboxylic acid, and Ar2 is 1,4-phenylene-8-201244187 That is, the repeat unit derived from citric acid is preferred. The repeating unit (3) is a repeating unit derived from the specified aromatic diol. As the repeating unit (3), the Ar3 is 1,4-phenylene, that is, the repeating unit derived from hydroquinone, and the Ar3 is 4,4'-extended biphenyl, that is, from 4, 4 The repeating unit of '-dihydroxybiphenyl is preferred. In the liquid crystal polyester, the content of the repeating unit containing the 2,6-anthranyl group, that is, the repeating unit (1) in which Ar1 is a 2,6-anthranyl group, and the repeating unit in which Ar2 is a 2,6-anthranyl group. (2) and Ar3 are the total content of the repeating unit (3) of 2,6-anthranyl group (3) relative to the total repeating unit (the mass of each repeating unit constituting the liquid crystal polyester, by dividing by The formula of each repeating unit 'determines the mass equivalent (mole) of each repeating unit, and the total amount of these repeating units is 40 mol% or more. By thinning a liquid crystal polyester having a specified repeating unit composition, a liquid crystal polyester film excellent in water vapor barrier properties can be obtained. The content of the 2,6-extended naphthyl group is preferably 50 mol% or more, more preferably 60 mol% or more, still more preferably 7 mol% or more, and 'repeated in the liquid crystal polyester. The total amount of the unit (1) relative to the total repeating unit is preferably 30 to 80 mol%, more preferably 40 to 70 mol%, and still more preferably 45 to 65 mol%: repeating unit The content of (2) is preferably from 1 35 to 35 mol%, more preferably from 15 to 30 mol%, still more preferably from 17.5 to 27. 5 mols, based on the total amount of the total repeat units. /〇: The content of the repeating unit (3) is preferably 1 〇 to 3 5 mol%, more preferably 〜5 to 3 〇 mol%, and even more preferably 17.5, based on the total amount of the total repeat units. ~ 27.5 mol%. The -9-201244187 liquid crystal polyester with the specified repeating unit composition is excellent in heat resistance and moldability.尙, the content of the repeating unit (2) and the content of the repeating unit (3) are preferably substantially the same. Further, the liquid crystal polyester may have a repeating unit other than the repeating unit (i) to (3) as required, but the total amount thereof is usually 10% or less with respect to the total amount of the total repeating unit. A typical example of a liquid crystal polyester having a heat resistance or a high melt tension of 5 mol% or less, and Ar1 is a repeating unit of 2,6-anthranyl group (1) with respect to a total of all repeat units. Having a repeating unit derived from 6-hydroxy-2-naphthoic acid, preferably 40 to 74.8 mol%, more preferably 40 to 64.5 mol%, still more preferably 50 to 58 mol%; Ar2 is 2, 6 - a repeating unit of the naphthyl group (2), that is, having a repeating unit derived from 2,6-naphthalenedicarboxylic acid, preferably 12.5 to 30 mol%, more preferably 17.5 to 30 mol%, More preferably, it is 20 to 25 mol%; Ar2 is a repeating unit of 1,4 -phenylene (2), that is, having a repeating unit of from p-citric acid is preferably 0.2 to 15 mol%, more preferably It is 5·5~12 mol%, and more preferably 2~10 mol%; Ar3 is a repeating unit of 1,4-phenylene (3), that is, 'has a repeating unit derived from hydroquinone, Good for 12.5 ~ 30 Mo %, more preferably 17.5 to 30 mol%, still more preferably 20 to 25 mol%: and 'Ar2 is a content of 2,6-anthranyl repeating unit (2) 'relative to eight 1> The repeating unit (2) of 2,6-anthranyl group and the total content of repeating unit (2) of 1,4-phenylene group of arsenyl group are preferably 〇.5 times mole or more, more preferably It is 0 · 6 times more than Mo. A liquid crystal polyester which is a monomer which imparts a repeating unit (1) (that is, a specified aromatic hydroxycarboxylic acid) and a monomer which imparts a repeating unit (2) (ie, -10-201244187, a designated aromatic dicarboxylic acid And a monomer which imparts a repeating unit (3) (i.e., a designated aromatic diol) to a total amount of a monomer having a 2,6-anthranyl group (i.e., 6-hydroxy-2-naphthoic acid, The total amount of 2,6-naphthalenedicarboxylic acid and 2,6-naphthalenediol can be obtained by polymerization (polycondensation) in a total amount of 40 mol% or more based on the total amount of all monomers. Manufacturing. In this case, as the aromatic hydroxycarboxylic acid, the aromatic dicarboxylic acid, and the aromatic diol, a derivative capable of independently polymerizing a part or all of the aromatic hydroxycarboxylic acid, the aromatic carboxylic acid, and the aromatic diol can be used. Examples of the derivative which can be polymerized with a compound having a carboxyl group such as an aromatic hydroxycarboxylic acid or an aromatic dicarboxylic acid, for example, a group in which a carboxyl group is converted into an alkoxycarbonyl group or an aryloxycarbonyl group, The carboxyl group is converted into a haloformyl group, and a carboxyl group is converted into a decyloxycarbonyl group. Examples of the derivative which can be polymerized with a compound having a hydroxyl group such as an aromatic hydroxycarboxylic acid or an aromatic diol, for example, a hydroxy group which is thiolated and converted into a decyloxy group. Further, the liquid crystal polyester is preferably produced by melt-polymerizing a monomer and polymerizing the obtained polymer (prepolymer) by solid phase polymerization. Thereby, a liquid crystal polyester having high heat resistance or high melt tension can be produced with good operability. The melt polymerization can be carried out in the presence of a catalyst. Examples of the catalyst include metal compounds such as magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, potassium acetate, and antimony trioxide. Or a nitrogen-containing heterocyclic compound such as N,N-dimethylaminopyridine or N-methylimidazole, preferably a nitrogen-containing heterocyclic compound. Thus, the liquid crystal polyester having the above-mentioned specified repeating unit composition is obtained, and the water vapor barrier property is excellent. The liquid crystal polyester preferably has a flow initiation temperature of 2 8 (TC or more, more preferably 201244187 is 290 ° C or higher, more preferably 295 ° C or higher, and further, lower is preferably 3 50 ° C or less. When flowing The starting temperature or the melt tension is more likely to increase, but when it is too high, it tends to be thermally deteriorated during molding. 尙 'Flow start temperature is also called flow temperature or temperature), and it is used to have an inner diameter imm and a long capillary rheology. When the liquid crystal polyester is melted and extruded at a temperature rising rate of 9.8 MPa (100 kg/cm 2 ) ° C /min, the melt viscosity is displayed at a temperature of 4800 Pa·, which is a standard for the molecular weight of the liquid crystal polyester. "Liquid Crystal Polymer - Synthesis ♦ Forming. Application -" CMC, June 5, 1987, ρ·95). The thus obtained repeating monoester having the above-mentioned designation is excellent in water vapor barrier property, and the crystal polyester can be suitably used as a material for a carrier tape of the present invention (TAB) to form a film having a thickness of 50 μm. When the relative humidity is 90%, the water vapor transmission rate is preferably 24 hours or less, more preferably 0.01 g/m2, and 24 hours is 0.005 g/m2. 24 hours or less. In the liquid crystal polyester, other components may be doped as needed. Examples of the other components include enamel fillers, liquid crystalline resins, and additives. The composition of the liquid crystal polyester is 80% by mass or more, and more preferably 90% by mass or more. As an example of the ruthenium filler material, it is exemplified that the milled glass fiber is usually 380 ° C. The higher the heat resistance, the higher the flow temperature is required for the melting (the flow of the nozzle of the flow 1 Omm is 4, the melt is The nozzle is given s (48,000 poise) (refer to the small liquid straight, the liquid crystal poly-rolled belt of the company's position is used for automatic joining. The liquid of the invention is at a temperature of 40 ° C and: 0.005 g / m 2 · Jiawei is used as a composition. The proportion of thermoplastics other than polyester is preferably glass fiber such as milled glass -12- 201244187 fiber, chopped glass fiber; potassium titanate whisker, Metallic or non-metallic whiskers such as alumina whiskers, aluminum borate whiskers, tantalum carbide whiskers, tantalum nitride whiskers; glass beads, hollow glass spheres, glass powder, mica, talc, clay, cerium oxide , Alumina, Potassium titanate 'wollastonite, calcium carbonate (heavy, light, colloid, etc.), magnesium carbonate, alkaline magnesium carbonate, sodium sulfate, calcium sulfate, barium sulfate, calcium sulfite, hydrogen Alumina, magnesium hydroxide, calcium hydroxide, strontium Calcium, strontium sand, vermiculite 'quartz, titanium oxide, zinc oxide, iron oxide graphite, molybdenum, asbestos, cerium oxide alumina fiber, alumina fiber, gypsum fiber, carbon fiber, carbon black, white carbon, Sandy earth, bentonite, sericite, shir asu, and black lead may be used as needed. Among them, glass fiber, mica, talc, and carbon fiber are preferably used. The material may be a surface treated person as an example. Examples of the surface treatment agent include a reactive coupling agent such as a decane coupling agent, a titanate coupling agent, a borane coupling agent, and a higher fatty acid. A lubricant such as a higher fatty acid ester, a higher fatty acid metal salt or a fluorocarbon surfactant. Examples of the thermoplastic resin other than the liquid crystal polyester include polycarbonate, polyamide, polyfluorene, and polyphenylene sulfide. Polyphenylene ether, polyether ketone, and polyether oxime imide resin. Examples of the additive include a release modifier such as a fluororesin or a metal soap, a nucleating agent, an antioxidant, a stabilizer, and a plasticizer. Slide agent Anti-coloring agent, coloring agent, ultraviolet absorbing agent, antistatic agent, lubricant, and hardener-13-201244187. The liquid crystal polyester or the composition thereof thus obtained is thinned to obtain the constitution of the present invention. The liquid crystal polyester film of the insulating layer of the LED substrate. As a method of thin film formation, for example, an extrusion molding method, a press molding method, a solution flow method, and an injection molding method are preferable, and an extrusion molding method is preferred. For the molding method, for example, a T-die method or an inflation method may be exemplified; and as the T-die method, a uniaxial stretching or a biaxial stretching may be employed. The stretching ratio (drawing ratio) of the uniaxially stretched film is usually 1.1 to 4 Å, preferably 10 to 40, more preferably 15 to 35. The stretching ratio of the MD direction (extrusion direction) of the biaxial film is usually 1.2 to 40 times: the stretching ratio of the TD direction (the direction perpendicular to the extrusion direction) of the biaxial film is usually 1.2 to 20 times. The stretch ratio in the MD direction of the blown film (drawdown ratio = bubble draw speed / resin discharge speed), usually 1.5 to 50, preferably 5 to 30; stretch ratio of TD of blown film (inflation) (blowing) ratio = bubble diameter / annular gap diameter), usually 1.5 to 10' is preferably 2 to 5. The thickness of the liquid crystal polyester film is preferably 5 to ΙΟΟμηη, more preferably 10 to 75 μm, and still more preferably 15 to 75 μm. If it is too thin, the strength will become insufficient; if it is too thick, the flexibility will become insufficient. The liquid crystal polyester film thus obtained has excellent water vapor barrier properties and can be used as an insulating layer of the substrate for LED of the present invention. When the liquid crystal polyester film is measured at a temperature of 40 ° C and a relative humidity of 90%, the water vapor transmission rate is preferably 0.005 g/m 2 · 24 hours or less, more preferably 〇. 〇 lg / m 2 · 24h to -14 - 201244187 Next, it is more preferably 0.005 g/m2 · 24 hours or less. The laminated film obtained by laminating a liquid crystal polyester film in a plurality of sheets or laminating another film such as a thermoplastic resin film to a liquid crystal polyester film can also be used as an insulating layer of the substrate for LED of the present invention. Further, in order to further improve the water vapor barrier property of the liquid crystal polyester film or the laminated film, a laminated film obtained by providing a water vapor barrier layer or providing another functional layer may also serve as an insulating layer of the substrate for LED of the present invention. use. The water vapor barrier layer ' is provided on at least one side of the liquid crystal polyester film. When it is provided on one side of the liquid crystal polyester film, it is preferably provided on the back surface of the liquid crystal polyester film (opposite to the surface on which the LED elements are disposed). As the substance constituting the water vapor barrier layer, a monomer or an oxide of at least one element selected from the group consisting of aluminum, tantalum, titanium, chromium, iron, cobalt, nickel, copper, zinc, silver, and gold is preferable. For the nitrides and the oxynitrides, two or more of these may be used as needed. As a method of forming the water vapor barrier layer, for example, a PVD method such as a vapor deposition method, a sputtering method, or an ion plating method; a CVD method such as a plasma CVD method, a thermal CVD method, or a laser CVD method; and a sol- A wet method such as a gel method, a plating method, or a coating method. Further, it is also possible to bond a separately prepared or even obtained foil to a liquid crystal polyester film. The liquid crystal polyester film may be subjected to a surface treatment as needed. As the method of the surface treatment, for example, corona discharge treatment, flame treatment, sputtering treatment, solvent treatment, UV treatment, plasma treatment, and the like can be exemplified.
將如此般所得到的液晶聚酯作爲絕緣層，並將LED 201244187 元件組裝於其至少之一側之面上後，藉由設置與LED元 件爲作爲電連結之配線之導體層，而得到LED用基板。 較佳爲如圖1所示，於絕緣層4之一側之面上設置導體層 5，並於另一側之面上，藉由設置在LED封裝1之運作時 ，將由LED元件7所生成之熱有效率地散熱至外部的散 熱層3，而得到LED用基板2。 作爲導體層5，由於導電性優異，故可將形成於層合 薄膜上之電極設定爲透明電極，但不須爲透明。一般而言 ，只要利用含有Al、Cu等之金屬或碳等之導電物質的電 糊料、或A1或Cu等之金屬等來予以形成即可。導體層之 形成方法未特別限制，只要是使用蒸鍍、濺鍍、離子電鍍 法、鍍敷、塗佈、印刷等公知的形成方法即可。作爲散熱 層3，由於散熱性優異，故較佳爲含有銅或鋁者，即金屬 製者，較佳爲由銅或銅合金所成者。 作爲將導體層5或散熱層3與絕緣層（液晶聚酯薄膜 )4予以層合之方法，例如’可舉例將銅箔等之金屬箔層 合至液晶聚酯薄膜4之方法、或將銅微粒子等金屬微粒子 塗佈於液晶聚酯薄膜4上之方法。 作爲金屬箔之層合方法，例如，可舉例使用黏著劑將 金屬箔與液晶聚酯薄膜4予以黏著之方法、或利用熱壓製 使熱融著之方法。使用黏著劑時，例如環氧樹脂系黏著劑 或丙烯酸樹脂系黏著劑爲可使用的。又，作爲進行熱壓製 時之處理條件，雖依使用的液晶聚酯薄膜4之規模（scale )或形狀、使用的金屬箔之厚度或種類等可予以適當地最 -16- 201244187 適化，但特佳爲在真空下進行熱壓製。尙，爲了使所得到 的LED用基板2展現出良好的表面平滑性，熱壓製之條 件較佳爲將處理溫度或處理壓力予以適當地最適化。此處 理溫度，較佳爲在製造欲熱壓製之液晶聚酯之際，基於所 進行固相聚合之溫度條件來予以決定，具體爲，將固相聚 合之最高溫度設定爲Tmax[°C]時，較佳爲使用超過此 之溫度來進行熱壓製，更佳爲使用Tmax + 5[°C]以上之溫度 來進行熱壓製。熱壓製溫度之上限，以低於使用的液晶聚 酯薄膜4中所含有的液晶聚酯之分解溫度般來予以選擇， 較佳以低於分解溫度30°C以上般設定者爲宜。尙，在此所 指的分解溫度，爲使用熱重量減少分析等公知的手段所求 得者。又，熱壓製之時間，通常爲1〜3 0小時；壓力，通 常爲1〜30MPa。 作爲銅微粒子等金屬微粒子之塗佈方法，例如，可舉 例鍍敷法、網板印刷法及濺鍍法。之中又較佳爲鍍敷法， 具體以使用無電解鍍敷或電解鑛敷者爲宜。又，亦爲了更 提昇藉由鍍敷所形成的導體層5之特性，較佳爲將導體層 5進行加熱處理，關於該加熱處理之條件，亦可採用與前 述作爲熱壓製之條件所記載的條件爲同等者。 前述之中，尤以適合之材質，即，爲了形成含有銅之 導體層5或散熱層3，而使用銅箔，將導體層5或散熱層 3層合於液晶聚酯薄膜4中，就作業性之面而言爲宜。又 ，使用銅箔者，就經濟性之方面亦爲有利。 對於藉由導體層5之圖型化之配線之形成，通常爲使 -17- 201244187 用触刻（加工）。首先’使配線之圖型成爲指定圖型般地 ’進行遮蔽（masking)，在被遮蔽的導體層5之部分及 未被遮蔽的導體層5之部分中，將後者的導體層5之部分 ’藉由所謂的濕式法（藥劑處理）之蝕刻加工予以除去。 作爲此蝕刻加工中所使用的藥劑，例如舉例氯化鐵水溶液 。又’對於遮蔽，只要使用市售的蝕刻抗蝕（resist )或 乾式薄膜即可。 接著’使用丙酮或氫氧化鈉水溶液，將蝕刻抗蝕或乾 式薄膜由被遮蔽的導體層5部分予以除去。如此般地，可 形成指定的配線。 對於導體層5之LED元件7之組裝，較佳爲，首先 ，將焊錫塗佈於導體層5上，並於其上載置LED元件7， 之後藉由通過迴焊爐（reflow oven)等將焊錫熔融，來將 LED元件7進行表面組裝，但亦可使用打線結合（wire bonding)將LED元件7與導體層5進行電連結。更，較 佳爲使用轉印成型等，將LED元件7以密封層6進行密 封。在此所謂的轉印成型，指爲將樹脂壓入已合模的模具 內之手法。 對於如此般所得到的LED封裝1，可設置連接導體層 5與散熱層3之通孔。藉此，使在LED元件7或導體層5 所產生之熱’有效率地流向散熱層3側，使變得能有效率 的進行散熱。尙，LED封裝1可爲晶片型或薄膜型。 【實施方式】 -18- 201244187 〔實施例〕 〔流動開始溫度之測定〕 使用Flow Tester ((股）島津製作所製「CFT-5 00型」 )，將約2g的試樣塡充於裝配有內徑1mm、長10mm的 模嘴之毛細管型流變計中，在9.8MPa ( lOOkgf/cm2)之荷 重下，以昇溫速度4°C/分鐘一邊使試樣熔融，一邊進行擠 出，測定熔融黏度爲顯示4 800Pa . s ( 48 000泊）之溫度 〔水蒸氣阻隔性之評估〕 依據JIS K7129 C法，藉由氣體透過率.透濕度測定 裝置（GTR-tec(股）製「GTR-30X」），以溫度40°C、相 對濕度90%之條件，來測定水蒸氣透過度。 〔ITO膜之表面電阻率之測定〕 ITO膜之表面電阻率（薄片電阻（sheet resistance) )，爲藉由 4探針法電阻測定裝置（三菱化學製 LORESTA AP )所測定。 製造例1 於具備有攪拌裝置、扭矩計、氮氣導入管、溫度計及 迴流冷卻器之反應器中，置入6 -羥基-2-萘甲酸103499g (5.5莫耳）、2,6-萘二羧酸378.33g(1.75莫耳）、對酞 酸83.07g(0.5莫耳）、氫醌272.52g(2.475莫耳：相對 -19- 201244187 於2,6-萘二羧酸及對酞酸之合計量爲〇_225莫耳過剩）、 乙酸酐1 226.8 7g(12莫耳）及作爲觸媒的丨_甲基咪唑 0.17g，並以氮氣將反應器內之氣體取代後，於氮氣氣流 下一邊攪拌，一邊花費15分鐘由室溫昇溫至145它，並以 1 45 t迴流1小時。接著，將副產的乙酸及未反應的乙酸 酐餾去，同時花費3小時30分鐘由145°C昇溫至310t， 以3 1 0°C保持3小時後，將內容物取出並冷卻至室溫。將 所得到的固形物使用粉碎機粉碎至粒徑約〇· 1〜1 mm後， 於氮氣氛下，花費1小時由室溫昇溫至2 5 0°C，並花費1〇 小時由2 5 0 °C昇溫至3 1 0 °C，藉由以3 1 (TC保持5小時來進 行固相聚合。固相聚合後，予以冷卻，得到粉末狀的液晶 聚酯。此液晶聚酯，相對於全重複單位之合計量，具有 Ar1爲2,6-伸萘基之重複單位（1 ) 55莫耳％ ' Ar2爲2,6_ 伸萘基之重複單位（2) 17.5莫耳％、Ar2爲l，4-伸苯基之 重複單位（2 ) 5莫耳％、及Ar3爲1,4-伸苯基之重複單位 (3 ) 22.5%，且其流動開始溫度爲33 3 1 » 製造例2 於與製造例1爲相同的反應器中，置入P-羥基安息香 酸911g(6.6莫耳）、對酞酸274g ( 1.65莫耳）、異酞酸 91g(0.55 莫耳）、4,4’-二羥基聯苯 409g(2.2 莫耳）、 乙酸酐1235g(12.1莫耳）及作爲觸媒的1-甲基咪唑 〇. 1 7g，並以氮氣將反應器內之氣體取代後，於氮氣氣流 下一邊搅拌，一邊花費15分鐘由室溫昇溫至150 °C ’並以 -20- 201244187 150°C迴流1小時。接著，添加1-甲基咪唑1.7g後，將副 產的乙酸及未反應的乙酸酐餾去，同時花費2小時50分 鐘由150°C昇溫至320°C，在確認到扭矩上昇之時間點’ 將內容物取出並冷卻至室溫。將所得到的固形物使用粉碎 機粉碎至粒徑約0.1〜lmm後，於氮氣氛下，花費1 .小時 由室溫昇溫至250°C，並花費5小時由250°C昇溫至28 5 °C ，藉由以285 °C保持3小時來進行固相聚合。固相聚合後 ，予以冷卻，得到粉末狀的液晶聚酯。此液晶聚酯，具有 Ari爲1，4-伸苯基之重複單位（1 ) 60莫耳％、Ar2爲1，4-伸苯基之重複單位（2 ) 15莫耳％、Ar2爲1，3-伸苯基之重 複單位（2 ) 5莫耳％、及Ar3爲4,4’-伸聯苯基之重複單位 (3 ) 2 0 %，且其流動開始溫度爲3 2 7 °C。 實施例1 將在製造例1所得到的液晶聚酯，使用二軸擠出機（ (股）池貝製「PCM-30」）進行製粒，製成顆粒狀後，供給 於單軸擠出機（螺桿徑50mm )並使熔融，從T形模頭（ 模唇長度3 00mm、模唇間隙lmm、模頭溫度35(TC )擠出 成爲薄膜狀並予以冷卻，而得到厚度25μιη的液晶聚酯薄 膜。此液晶聚酯薄膜之水蒸氣透過度爲0.01 lg/m2 . 24h , 在作爲成爲LED用基板之絕緣層的液晶聚酯薄膜，水蒸 氣阻隔性爲優異。 實施例2 -21 - 201244187 將在製造例1所得到的液晶聚酯，使用二軸擠出機（ (股）池貝製「PCM-30」）進行製粒，製成顆粒狀後，供給 於單軸擠出機（螺桿徑5 0mm )並使熔融，從T形模頭（ 模唇長度3 00mm、模唇間隙1mm、模頭溫度3 50 °C )擠出 成爲薄膜狀並予以冷卻，而得到厚度5 Ομιη的液晶聚酯薄 膜。此液晶聚酯薄膜之水蒸氣透過度爲0.0 03 0g/m2 · 24h ，在作爲成爲LED用基板之絕緣層的液晶聚酯薄膜，水 蒸氣阻隔性爲優異。 實施例3 對於在實施例2所得到的層合薄膜，藉由離子電鍍法 ，在已形成氣體阻隔層之相反面上，使用ITO (氧化銦錫 )，以基板溫度180°C，形成厚度200nm的透明電極（ ITO膜）。測定形成於此層合薄膜上之透明電極的薄片電 阻，結果爲9.1 Ω / □。 比較例1 將在製造例2所得到的液晶聚酯，使用二軸擠出機（ (股）池貝製「PCM-30」）進行製粒，製成顆粒狀後，供給 於單軸擠出機（螺桿徑5 Omm )並使熔融，從T形模頭（ 模唇長度300mm、模唇間隙1mm、模頭溫度3 5 0°C )擠出 成爲薄膜狀並予以冷卻，而得到厚度5 0 μ m的液晶聚酯薄 膜。此液晶聚醋薄膜之水蒸氣透過度爲〇.343g/m2. 24h， 在作爲成爲LED用基板之絕緣層的液晶聚酯薄膜，水蒸 -22- 201244187 氣阻隔性爲不足。 比較例2 將在製造例2所得到的粉末狀的液晶聚酯，使用二軸 擠出機（（股）池貝製「PCM-30」）進行製粒，製成顆粒狀 後，供給於單軸擠出機（螺桿徑50mm )並使熔融，從T 形模頭（模唇長度3 00mm、模唇間隙1 mm、模頭溫度3 5 0 °C )擠出成爲薄膜狀並予以冷卻，而得到厚度50μιη的液 晶聚酯薄膜。此液晶聚酯薄膜之水蒸氣透過度爲 0.0 80g/m2 · 24h，在作爲成爲LED用基板之絕緣層的液晶 聚酯薄膜，水蒸氣阻隔性爲不足。 比較例3 對於在比較例2所得到的層合薄膜，藉由離子電鍍法 ，在已形成氣體阻隔層之相反面上，使用ITO (氧化銦錫 )，以基板溫度180°C，形成厚度200nm的透明電極。測 定形成於此層合薄膜上之透明電極的薄片電阻，結果爲 12.3 Ω /□。 【圖式簡單說明】 [圖1]模擬地表示本發明之LED封裝之例的剖面圖。 【主要元件符號說明】 1 : LED封裝 -23- 201244187 2 : LED用基板 3 ’·散熱層 4 :絕緣層（液晶聚醋層 5 :導體層 6 密封層 7 : LED元件 -24The liquid crystal polyester obtained in this manner is used as an insulating layer, and the LED 201244187 element is assembled on at least one side thereof, and then the LED element is provided as a conductor layer of the wiring electrically connected to the LED element. Substrate. Preferably, as shown in FIG. 1, a conductor layer 5 is provided on one side of the insulating layer 4, and on the other side, by being disposed in the operation of the LED package 1, it will be generated by the LED element 7. The heat is efficiently radiated to the external heat dissipation layer 3 to obtain the LED substrate 2. Since the conductor layer 5 is excellent in electrical conductivity, the electrode formed on the laminated film can be set as a transparent electrode, but it is not necessary to be transparent. In general, it may be formed by using an electric paste containing a metal such as Al or Cu or a conductive material such as carbon, or a metal such as A1 or Cu. The method for forming the conductor layer is not particularly limited as long as it is a known formation method such as vapor deposition, sputtering, ion plating, plating, coating, or printing. The heat dissipating layer 3 is preferably made of copper or aluminum, that is, a metal or copper alloy, and is preferably made of copper or a copper alloy. As a method of laminating the conductor layer 5 or the heat dissipation layer 3 and the insulating layer (liquid crystal polyester film) 4, for example, a method of laminating a metal foil such as copper foil to the liquid crystal polyester film 4, or copper A method of applying metal fine particles such as fine particles to the liquid crystal polyester film 4. As a method of laminating the metal foil, for example, a method of adhering the metal foil to the liquid crystal polyester film 4 with an adhesive or a method of thermally melting by hot pressing can be exemplified. When an adhesive is used, for example, an epoxy resin adhesive or an acrylic resin adhesive can be used. In addition, as the processing conditions at the time of hot pressing, the scale or shape of the liquid crystal polyester film 4 to be used, the thickness or type of the metal foil to be used, and the like can be suitably adjusted to the most -16 - 201244187, but It is particularly preferred to carry out hot pressing under vacuum. That is, in order to exhibit good surface smoothness of the obtained substrate for LED 2, the conditions of hot pressing are preferably such that the processing temperature or the processing pressure is appropriately optimized. The treatment temperature is preferably determined based on the temperature conditions of the solid phase polymerization to be performed when the liquid crystal polyester to be hot pressed is produced, specifically, the maximum temperature of the solid phase polymerization is set to Tmax [° C.] It is preferred to carry out hot pressing using a temperature exceeding this, and it is more preferable to carry out hot pressing using a temperature of Tmax + 5 [°C] or more. The upper limit of the hot pressing temperature is selected to be lower than the decomposition temperature of the liquid crystal polyester contained in the liquid crystal polyester film 4 to be used, and it is preferably set to be lower than the decomposition temperature by 30 ° C or higher. Here, the decomposition temperature referred to herein is obtained by a known means such as thermal weight reduction analysis. Further, the time of hot pressing is usually from 1 to 30 hours; and the pressure is usually from 1 to 30 MPa. Examples of the method of applying the metal fine particles such as copper fine particles include a plating method, a screen printing method, and a sputtering method. Among them, a plating method is preferred, and those using electroless plating or electrolytic ore coating are preferred. Further, in order to further improve the characteristics of the conductor layer 5 formed by plating, it is preferable to heat-treat the conductor layer 5, and the conditions of the heat treatment may be the same as those described above as conditions for hot pressing. The conditions are equal. In the above, a suitable material, that is, a copper foil is used to form the copper-containing conductor layer 5 or the heat dissipation layer 3, and the conductor layer 5 or the heat dissipation layer 3 is laminated on the liquid crystal polyester film 4, and the operation is performed. It is appropriate for the face of sex. Also, the use of copper foil is also beneficial in terms of economics. For the formation of wiring patterned by the conductor layer 5, -17-201244187 is usually used for etching (machining). First, 'masking the pattern of the wiring into a prescribed pattern', and the portion of the conductor layer 5 of the latter in the portion of the shielded conductor layer 5 and the portion of the unshielded conductor layer 5 It is removed by etching by a so-called wet method (pharmaceutical treatment). As the agent used in this etching process, for example, an aqueous solution of ferric chloride is exemplified. Further, as for the masking, a commercially available etching resist or a dry film may be used. Next, the etching resist or dry film is partially removed from the shielded conductor layer 5 by using acetone or an aqueous sodium hydroxide solution. In this way, the specified wiring can be formed. For the assembly of the LED element 7 of the conductor layer 5, first, solder is applied onto the conductor layer 5, and the LED element 7 is placed thereon, and then solder is passed through a reflow oven or the like. The LED element 7 is surface-molded by melting, but the LED element 7 and the conductor layer 5 may be electrically connected by wire bonding. Further, it is preferable to seal the LED element 7 with the sealing layer 6 by using transfer molding or the like. The term "transfer molding" as used herein refers to a method of pressing a resin into a mold that has been clamped. For the LED package 1 thus obtained, a through hole connecting the conductor layer 5 and the heat dissipation layer 3 can be provided. Thereby, the heat generated in the LED element 7 or the conductor layer 5 is efficiently flowed to the side of the heat dissipation layer 3, so that heat can be efficiently dissipated. Hi, the LED package 1 can be of a wafer type or a film type. [Embodiment] -18-201244187 [Examples] [Measurement of the flow start temperature] Using Flow Tester ("CFT-5 00 type" manufactured by Shimadzu Corporation), about 2 g of the sample was filled in the assembly. In a capillary rheometer of a die having a diameter of 1 mm and a length of 10 mm, the sample was melted and melted at a temperature increase rate of 4 ° C/min under a load of 9.8 MPa (100 kgf/cm 2 ) to measure the melt viscosity. In order to show the temperature of 4 800 Pa s (48 000 poise) [Evaluation of water vapor barrier property] According to JIS K7129 C method, gas permeability and moisture permeability measuring device (GTR-30X made by GTR-tec) The water vapor transmission rate was measured under the conditions of a temperature of 40 ° C and a relative humidity of 90%. [Measurement of Surface Resistivity of ITO Film] The surface resistivity (sheet resistance) of the ITO film was measured by a 4-probe resistance measuring device (LORESTA AP manufactured by Mitsubishi Chemical Corporation). Production Example 1 In a reactor equipped with a stirring device, a torque meter, a nitrogen gas introduction tube, a thermometer, and a reflux condenser, 103,499 g (5.5 mol), 2,6-naphthalenedicarboxylate of 6-hydroxy-2-naphthoic acid was placed. Acid 378.33g (1.75 moles), phthalic acid 83.07g (0.5 moles), hydroquinone 272.52g (2.475 moles: relative -19- 201244187 in 2,6-naphthalenedicarboxylic acid and citric acid 〇 _ 225 molar excess), acetic anhydride 1 226.8 7 g (12 mol) and 0.17 g of 丨-methylimidazole as a catalyst, and the gas in the reactor was replaced with nitrogen, and then stirred under a nitrogen gas stream. The temperature was raised from room temperature to 145 while taking 15 minutes, and refluxed at 1 45 t for 1 hour. Next, the by-produced acetic acid and unreacted acetic anhydride were distilled off, and the temperature was raised from 145 ° C to 310 t in 3 hours and 30 minutes, and maintained at 3 10 ° C for 3 hours, and then the contents were taken out and cooled to room temperature. . The obtained solid matter is pulverized to a particle size of about 1·1 to 1 mm using a pulverizer, and then heated in a nitrogen atmosphere for 1 hour from room temperature to 250 ° C, and takes 1 hour from 2 5 0 The temperature was raised to 3 10 ° C at ° C, and solid phase polymerization was carried out by keeping 3 1 (TC for 5 hours. After solid phase polymerization, it was cooled to obtain a powdery liquid crystal polyester. This liquid crystal polyester, relative to the whole The total unit of repeating unit, having a repeating unit of Ar1 of 2,6-anthranyl group (1) 55 mol% 'Ar2 is a repeating unit of 2,6_stretching naphthyl group (2) 17.5 mol%, Ar2 is l, 4-cyclophenyl repeating unit (2) 5 mol %, and Ar3 is a repeating unit of 1,4-phenylene (3) 22.5%, and its flow initiation temperature is 33 3 1 » Manufacturing Example 2 In Production Example 1, the same reactor was charged with 911 g (6.6 mol) of P-hydroxybenzoic acid, 274 g (1.65 mol) of citric acid, 91 g (0.55 mol) of isonic acid, and 4,4'-di Hydroxybiphenyl 409g (2.2 moles), acetic anhydride 1235g (12.1 moles) and 1-methylimidazolium as a catalyst. 1 7g, and the gas in the reactor was replaced with nitrogen, and then under a nitrogen gas stream. Stir, It was heated from room temperature to 150 ° C for 15 minutes and refluxed for 1 hour at -20-201244187 150 ° C. Then, after adding 1.7 g of 1-methylimidazole, the by-produced acetic acid and unreacted acetic anhydride were distilled. At the same time, it took 2 hours and 50 minutes to raise the temperature from 150 ° C to 320 ° C, and at the time point when the torque rise was confirmed, the contents were taken out and cooled to room temperature. The obtained solid matter was pulverized to a particle diameter using a pulverizer. After about 0.1 to 1 mm, it was heated from room temperature to 250 ° C under a nitrogen atmosphere for 1 hour, and heated from 250 ° C to 28 5 ° C for 5 hours, by holding at 285 ° C for 3 hours. Solid phase polymerization. After solid phase polymerization, it is cooled to obtain a powdery liquid crystal polyester having a repeating unit of Ari of 1,4-phenylene (1) 60 mol% and Ar2 of 1, Repeating unit of 4-phenylene (2) 15 mol%, Ar2 is a repeating unit of 1,3-phenylene (2) 5 mol%, and Ar3 is a repeat of 4,4'-extended biphenyl The unit (3) was 20%, and the flow initiation temperature was 3 2 7 ° C. Example 1 The liquid crystal polyester obtained in Production Example 1 was subjected to a two-axis extruder (() "PCM-30" was granulated and granulated, and then supplied to a uniaxial extruder (screw diameter: 50 mm) and melted from a T-die (mold lip length of 300 mm, lip gap of 1 mm, The die temperature 35 (TC) was extruded into a film shape and cooled to obtain a liquid crystal polyester film having a thickness of 25 μm. The liquid crystal polyester film has a water vapor permeability of 0.01 lg/m2. 24h, and the liquid crystal polyester film which is an insulating layer for the LED substrate has excellent water vapor barrier properties. Example 2 -21 - 201244187 The liquid crystal polyester obtained in Production Example 1 was granulated using a two-axis extruder ("PCM-30" manufactured by Shikibe Co., Ltd.) to obtain pellets, and then supplied to the single sheet. The shaft extruder (screw diameter 50 mm) was melted and extruded from a T-die (length of die lip 300 mm, lip gap 1 mm, die temperature 3 50 °C) into a film shape and cooled. A liquid crystal polyester film having a thickness of 5 μm. The liquid crystal polyester film has a water vapor permeability of 0.003 0 g/m2 · 24 h, and is excellent in water vapor barrier properties as a liquid crystal polyester film which is an insulating layer for a substrate for LED. Example 3 For the laminated film obtained in Example 2, ITO (Indium Tin Oxide) was used on the opposite side of the gas barrier layer formed by ion plating to form a thickness of 200 nm at a substrate temperature of 180 ° C. Transparent electrode (ITO film). The sheet resistance of the transparent electrode formed on this laminated film was measured and found to be 9.1 Ω / □. Comparative Example 1 The liquid crystal polyester obtained in Production Example 2 was granulated using a two-axis extruder ("PCM-30" manufactured by Shibuya Co., Ltd.) to obtain pellets, and then supplied to a single-axis extruder. (screw diameter 5 Omm) and melted, extruded from a T-die (length of die lip 300mm, lip gap 1mm, die temperature 305 °C) into a film shape and cooled to obtain a thickness of 50 μ m liquid crystal polyester film. The water vapor transmission degree of the liquid crystal polyester film is 343.343 g/m2. 24h, and the liquid crystal polyester film which is an insulating layer for the substrate for LEDs is insufficient in water vapor -22-201244187. Comparative Example 2 The powdery liquid crystal polyester obtained in Production Example 2 was granulated by a two-axis extruder ("PCM-30" manufactured by Shikibe Co., Ltd.) to obtain a pellet shape, and then supplied to a single shaft. The extruder (screw diameter 50 mm) was melted and extruded from a T-die (length of die lip 300 mm, lip gap 1 mm, die temperature 305 °C) into a film and cooled. A liquid crystal polyester film having a thickness of 50 μm. The liquid crystal polyester film has a water vapor permeability of 0.080 g/m2 · 24 h, and the water vapor barrier property is insufficient for the liquid crystal polyester film which is an insulating layer for the LED substrate. Comparative Example 3 With respect to the laminated film obtained in Comparative Example 2, ITO (Indium Tin Oxide) was used on the opposite side to which the gas barrier layer had been formed by ion plating, and a thickness of 200 nm was formed at a substrate temperature of 180 ° C. Transparent electrode. The sheet resistance of the transparent electrode formed on this laminated film was measured and found to be 12.3 Ω / □. BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] A cross-sectional view schematically showing an example of an LED package of the present invention. [Description of main component symbols] 1 : LED package -23- 201244187 2 : Substrate for LED 3 '· Heat dissipation layer 4 : Insulation layer (liquid crystal layer 5 : Conductor layer 6 Seal layer 7 : LED element -24