| US 7,491,447 B2 | ||
| Double-sided metallic laminate and method for manufacturing the same | ||
| Soon-yong Park, Daejeon (Korea, Republic of); You-jin Kyung, Seoul (Korea, Republic of); Heon-sik Song, Daejeon (Korea, Republic of); Byeong-in Ahn, Daejeon (Korea, Republic of); Joo-eun Ko, Seoul (Korea, Republic of); Yong-jun Park, Daejeon (Korea, Republic of); and Se-myung Jang, Jeonju-si (Korea, Republic of) | ||
| Assigned to LG Chem, Ltd., Seoul (Korea, Republic of) | ||
| Appl. No. 10/550,582 PCT Filed Mar. 25, 2004, PCT No. PCT/KR2004/000666 § 371(c)(1), (2), (4) Date Jun. 26, 2006, PCT Pub. No. WO2004/085146, PCT Pub. Date Oct. 07, 2004. |
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| Claims priority of application No. 10-2003-0018811 (KR), filed on Mar. 26, 2003; and application No. 10-2003-0018812 (KR), filed on Mar. 26, 2003. | ||
| Prior Publication US 2007/0042202 A1, Feb. 22, 2007 | ||
| Int. Cl. B32B 15/08 (2006.01) | ||
| U.S. Cl. 428—458 [428/473.5; 427/384; 156/307.5] | 17 Claims |
1. A double-sided metallic laminate comprising a metallic layer at one side, a resin layer of a low expansion polyimide having
a thermal expansion coefficient of 5×10−6 to 2.5×10−5/° C., a resin layer of a thermoplastic polyimide and a metallic layer at the other side, wherein the thermoplastic polyimide
has a glass transition temperature of 200 to 250° C. and is a copolymer including the following formula 2a, formula 2b, formula
2c and formula 2d:
 in which, k≧1, l, m, n≧0,l=m=n≠0, k≧l, k+l>1.5(m+n) and k+m>1.5(l+n),
X2 is at least one selected from the consisting of
 Y2 and Y3 are each independently or simultaneously -, —O—, —CO—, —S—, —SO2—, —C(CH3)2— or —CONH—,
X3 is
 Y4 is -, —O— or —CO—.
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