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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Summary of Subsidiaries |
2) | Subsidiaries included in consolidated financial statements were as follows:
|  |  |  | Establishment and |  | Percentage of Ownership (%) December 31
Name of Investee |  | Main Businesses |  | Operating Location |  | 2016 |  | 2017
A.S.E. Holding Limited |  | Holding company |  | Bermuda |  | 100.0 |  | 100.0
J & R Holding Limited (“J&R Holding”) |  | Holding company |  | Bermuda |  | 100.0 |  | 100.0
Innosource Limited |  | Holding company |  | British Virgin Islands |  | 100.0 |  | 100.0
Omniquest Industrial Limited |  | Holding company |  | British Virgin Islands |  | 100.0 |  | 100.0
ASE Marketing & Service Japan Co., Ltd. |  | Engaged in marketing and sales services |  | Japan |  | 100.0 |  | 100.0
ASE Test, Inc. |  | Engaged in the testing of semiconductors |  | Kaohsiung, ROC |  | 100.0 |  | 100.0
USI Inc. (“USIINC”) |  | Engaged in investing activity |  | Nantou, ROC |  | 99.2 |  | 99.2
Luchu Development Corporation (“Luchu”) |  | Engaged in the development of real estate properties |  | Taipei, ROC |  | 86.1 |  | 86.1
TLJ Intertech Inc. (“TLJ”) |  | Engaged in information software services |  | Taipei, ROC |  | 60.0 |  | 60.0
Alto Enterprises Limited |  | Holding company |  | British Virgin Islands |  | 100.0 |  | 100.0
Super Zone Holdings Limited |  | Holding company |  | Hong Kong |  | 100.0 |  | 100.0
ASE (Kun Shan) Inc. |  | Engaged in the packaging and testing of semiconductors |  | Kun Shan, China |  | 100.0 |  | 100.0
ASE Investment (Kun Shan) Limited |  | Holding company |  | Kun Shan, China |  | 100.0 |  | 100.0
Advanced Semiconductor Engineering (China) Ltd. |  | Will engage in the packaging and testing of semiconductors |  | Shanghai, China |  | 100.0 |  | 100.0
ASE Investment (Labuan) Inc. |  | Holding company |  | Malaysia |  | 100.0 |  | 100.0
ASE Test Limited (“ASE Test”) |  | Holding company |  | Singapore |  | 100.0 |  | 100.0
ASE (Korea) Inc. (“ASE Korea”) |  | Engaged in the packaging and testing of semiconductors |  | Korea |  | 100.0 |  | 100.0
J&R Industrial Inc. |  | Engaged in leasing equipment and investing activity |  | Kaohsiung, ROC |  | 100.0 |  | 100.0
ASE Japan Co., Ltd. (“ASE Japan”) |  | Engaged in the packaging and testing of semiconductors |  | Japan |  | 100.0 |  | 100.0
ASE (U.S.) Inc. |  | After-sales service and sales support |  | U.S.A. |  | 100.0 |  | 100.0
Global Advanced Packaging Technology Limited |  | Holding company |  | British Cayman Islands |  | 100.0 |  | 100.0
(Continued)
|  |  |  | Establishment and |  | Percentage of Ownership (%) December 31
Name of Investee |  | Main Businesses |  | Operating Location |  | 2016 |  | 2017
ASE WeiHai Inc. |  | Engaged in the packaging and testing of semiconductors |  | Shandong, China |  | 100.0 |  | 100.0
Suzhou ASEN Semiconductors Co., Ltd. (“ASEN”) |  | Engaged in the packaging and testing of semiconductors |  | Suzhou, China |  | 60.0 |  | 60.0
Anstock Limited |  | Engaged in financing activity |  | British Cayman Islands |  | 100.0 |  | 100.0
Anstock II Limited |  | Engaged in financing activity |  | British Cayman Islands |  | 100.0 |  | 100.0
ASE Module (Shanghai) Inc. |  | Absorbed by ASE (Shanghai) Inc. in February 2017 |  | Shanghai, China |  | 100.0 |  | -
ASE (Shanghai) Inc. |  | Engaged in the production of substrates |  | Shanghai, China |  | 100.0 |  | 100.0
ASE Corporation |  | Holding company |  | British Cayman Islands |  | 100.0 |  | 100.0
ASE Mauritius Inc. |  | Holding company |  | Mauritius |  | 100.0 |  | 100.0
ASE Labuan Inc. |  | Holding company |  | Malaysia |  | 100.0 |  | 100.0
Shanghai Ding Hui Real Estate Development Co., Ltd. |  | Engaged in the development, construction and sale of real estate properties |  | Shanghai, China |  | 100.0 |  | 100.0
Shanghai Ding Qi Property Management Co., Ltd. |  | Engaged in the management of real estate properties |  | Shanghai, China |  | 100.0 |  | 100.0
Advanced Semiconductor Engineering (HK) Limited |  | Engaged in the trading of substrates |  | Hong Kong |  | 100.0 |  | 100.0
Shanghai Ding Wei Real Estate Development Co., Ltd. |  | Engaged in the development, construction and leasing of real estate properties |  | Shanghai, China |  | 100.0 |  | 100.0
Shanghai Ding Yu Real Estate Development Co., Ltd. |  | Engaged in the development, construction and leasing of real estate properties |  | Shanghai, China |  | 100.0 |  | 100.0
Shanghai Ding Fan Department Store Co., Ltd. |  | Engaged in department store business |  | Shanghai, China |  | 100.0 |  | 100.0
Kun Shan Ding Yue Real Estate Development Co., Ltd. (“KSDY”) |  | Engaged in the development, construction and leasing of real estate properties and was disposed of in June 2017 (Note 29) |  | Kun Shan, China |  | 100.0 |  | -
Kun Shan Ding Hong Real Estate Development Co., Ltd. |  | Engaged in the development, construction and leasing of real estate properties |  | Kun Shan, China |  | 100.0 |  | 100.0
Shanghai Ding Xu Property Management Co., Ltd. |  | Engaged in the management of real estate properties, and was established in August 2017 |  | Shanghai, China |  | - |  | 100.0
(Continued)
|  |  |  | Establishment and |  | Percentage of Ownership (%) December 31
Name of Investee |  | Main Businesses |  | Operating Location |  | 2016 |  | 2017
ASE Electronics Inc. |  | Engaged in the production of substrates |  | Kaohsiung, ROC |  | 100.0 |  | 100.0
ASE Test Holdings, Ltd. |  | Holding company |  | British Cayman Islands |  | 100.0 |  | 100.0
ASE Holdings (Singapore) Pte. Ltd. |  | Holding company |  | Singapore |  | 100.0 |  | 100.0
ASE Singapore Pte. Ltd. |  | Engaged in the packaging and testing of semiconductors |  | Singapore |  | 100.0 |  | 100.0
ISE Labs, Inc. |  | Engaged in the testing of semiconductors |  | U.S.A. |  | 100.0 |  | 100.0
ASE Electronics (M) Sdn. Bhd. |  | Engaged in the packaging and testing of semiconductors |  | Malaysia |  | 100.0 |  | 100.0
ASE Assembly & Test (Shanghai) Limited |  | Engaged in the packaging and testing of semiconductors |  | Shanghai, China |  | 100.0 |  | 100.0
ASE Trading (Shanghai) Ltd. |  | Engaged in trading activity |  | Shanghai, China |  | 100.0 |  | 100.0
Wuxi Tongzhi Microelectronics Co., Ltd. |  | Engaged in the packaging and testing of semiconductors |  | Wuxi, China |  | 100.0 |  | 100.0
Huntington Holdings International Co., Ltd. |  | Holding company |  | British Virgin Islands |  | 99.2 |  | 99.2
Unitech Holdings International Co., Ltd. |  | Holding company |  | British Virgin Islands |  | 99.2 |  | 99.2
Real Tech Holdings Limited |  | Holding company |  | British Virgin Islands |  | 99.2 |  | 99.2
Universal ABIT Holding Co., Ltd. |  | In the process of liquidation |  | British Cayman Islands |  | 99.2 |  | 99.2
Rising Capital Investment Limited |  | Holding company |  | British Virgin Islands |  | 99.2 |  | 99.2
Rise Accord Limited |  | Holding company |  | British Virgin Islands |  | 99.2 |  | 99.2
Universal Scientific Industrial (Kunshan) Co., Ltd. |  | Engaged in the manufacturing and sale of computer assistance system and related peripherals |  | Kun Shan, China |  | 99.2 |  | 99.2
USI Enterprise Limited (“USIE”) |  | Engaged in the services of investment advisory and warehousing management |  | Hong Kong |  | 97.0 |  | 96.9
USISH |  | Engaged in the designing, manufacturing and sale of electronic components |  | Shanghai, China |  | 75.9 |  | 75.8
Universal Global Technology Co., Limited |  | Holding company |  | Hong Kong |  | 75.9 |  | 75.8
Universal Global Technology (Kunshan) Co., Ltd. |  | Engaged in the designing and manufacturing of electronic components |  | Kun Shan, China |  | 75.9 |  | 75.8
(Continued)
|  |  |  | Establishment and |  | Percentage of Ownership (%) December 31
Name of Investee |  | Main Businesses |  | Operating Location |  | 2016 |  | 2017
Universal Global Technology (Shanghai) Co., Ltd. |  | Engaged in the processing and sales of computer and communication peripherals as well as business in import and export of goods and technology |  | Shanghai, China |  | 75.9 |  | 75.8
Universal Global Electronics (Shanghai) Co., Ltd. |  | Engaged in the sale of electronic components and telecommunications equipment |  | Shanghai, China |  | 75.9 |  | 75.8
Universal Global Industrial Co., Limited |  | Engaged in manufacturing, trading and investing activity |  | Hong Kong |  | 75.9 |  | 75.8
Universal Global Scientific Industrial Co., Ltd. (“UGTW”) |  | Engaged in the manufacturing of components of telecomm and cars and provision of related R&D services |  | Nantou, ROC |  | 75.9 |  | 75.8
USI America Inc. |  | Engaged in the manufacturing and processing of motherboards and wireless network communication and provision of related technical service. |  | U.S.A. |  | 75.9 |  | 75.8
Universal Scientific Industrial De Mexico S.A. De C.V. |  | Engaged in the assembling of motherboards and computer components |  | Mexico |  | 75.9 |  | 75.8
USI Japan Co., Ltd. |  | Engaged in the manufacturing and sale of computer peripherals, integrated chip and other related accessories |  | Japan |  | 75.9 |  | 75.8
USI Electronics (Shenzhen) Co., Ltd. |  | Engaged in the design, manufacturing and sale of motherboards and computer peripherals |  | Shenzhen, China |  | 75.9 |  | 75.8
Universal Scientific Industrial Co., Ltd. (“USI”) |  | Engaged in the manufacturing, processing and sale of computers, computer peripherals and related accessories |  | Nantou, ROC |  | 75.2 |  | 75.5

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