| Intangible Assets |
Intangible assets consist of the following (amounts in thousands): | | | | | | | | | | | | | | | | September 30, 2014 | | | Gross Amount | | Accumulated Amortization | | Net Amount | Developed technology | | $ | 559,828 |
| | $ | (161,145 | ) | | $ | 398,683 |
| Customer-related | | 263,805 |
| | (147,489 | ) | | 116,316 |
| Trademarks and trade names | | 15,730 |
| | (8,323 | ) | | 7,407 |
| Backlog | | 26,302 |
| | (25,331 | ) | | 971 |
| In-process technology | | 75,280 |
| | — |
| | 75,280 |
| Distribution rights | | 5,585 |
| | (5,217 | ) | | 368 |
| Covenants not to compete | | 400 |
| | (400 | ) | | — |
| | | $ | 946,930 |
| | $ | (347,905 | ) | | $ | 599,025 |
|
| | | | | | | | | | | | | | | | March 31, 2014 | | | Gross Amount | | Accumulated Amortization | | Net Amount | Developed technology | | $ | 402,669 |
| | $ | (117,222 | ) | | $ | 285,447 |
| Customer-related | | 195,800 |
| | (109,170 | ) | | 86,630 |
| Trademarks and trade names | | 15,730 |
| | (7,118 | ) | | 8,612 |
| Backlog | | 24,610 |
| | (24,610 | ) | | — |
| In-process technology | | 64,396 |
| | — |
| | 64,396 |
| Distribution rights | | 5,585 |
| | (5,171 | ) | | 414 |
| Covenants not to compete | | 400 |
| | (400 | ) | | — |
| | | $ | 709,190 |
| | $ | (263,691 | ) | | $ | 445,499 |
|
|
| Projected Amortization Expense |
The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2015 through fiscal 2019, absent any future acquisitions or impairment charges (amounts in thousands):
| | | Year ending March 31, | Projected Amortization Expense | 2015 | $99,063 | 2016 | 150,298 | 2017 | 92,227 | 2018 | 73,926 | 2019 | 65,650 |
|
| Goodwill Activity |
Goodwill activity for the six months ended September 30, 2014 was as follows (amounts in thousands): | | | | | | | | | | Semiconductor Products Reporting Unit | | Technology Licensing Reporting Unit | Balance at March 31, 2014 | $ | 256,897 |
| | $ | 19,200 |
| Additions due to the acquisition of Supertex | 132,508 |
| | — |
| Additions due to acquisition of controlling interest in ISSC | 152,243 |
| | — |
| Adjustments due to other acquisitions | 625 |
| | — |
| Foreign currency translation adjustments | (3,508 | ) | | — |
| Balance at September 30, 2014 | $ | 538,765 |
| | $ | 19,200 |
|
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