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Expenses by nature | 12 Months Ended
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Dec. 31, 2021
Text block [abstract] |
Expenses by nature |
31. | Expenses by nature
|  | Year ended December 31, |
|  | 2019 |  |  | 2020 |  |  | 2021 |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Raw materials and supplies used |  |  | 3,575,283 |  |  |  | 4,708,493 |  |  |  | 5,518,145 |
Employee benefit expenses |  |  | 6,075,773 |  |  |  | 6,010,227 |  |  |  | 6,757,888 |
Depreciation expenses |  |  | 3,731,914 |  |  |  | 4,175,519 |  |  |  | 4,634,112 |
Others |  |  | 4,590,720 |  |  |  | 4,686,218 |  |  |  | 5,053,088 |
|  |  | 17,973,690 |  |  |  | 19,580,457 |  |  |  | 21,963,233 |

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- Definition Disclosure of classification of expenses. + References No definition available. + Details
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Namespace Prefix: | imos_
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Balance Type: | na
Period Type: | duration

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- Definition Text block [abstract] + References No definition available. + Details
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Namespace Prefix: | imos_
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Balance Type: | na
Period Type: | duration