7.	Income Taxes

Our income tax expense decreased by $7,357, to $26,737 for the 13-week period ended June 28, 2014, from $34,094 for the 13-week period ended June 29, 2013. The effective tax rate was 12.8% in the second quarter of 2014 compared to 16.5% in the second quarter of 2013. The second quarter 2014 effective tax rate decreased as compared to second quarter 2013 due to favorable income mix across tax jurisdictions partially offset by the expiration of certain Taiwan tax holidays, the expiration of the Federal Research & Development Tax Credit on December 31, 2013 and reduced reserve releases. Release of uncertain tax position reserves due to expiration of certain statutes of limitations or completion of tax audits reduced our expense by $5,190 and $9,957, respectively, in second quarter 2014 and second quarter 2013.

Our income tax expense increased by $23,325, to $50,387 for the first half of 2014, from $27,062 for the first half of 2013. The effective tax rate was 14.3% in the first half of 2014 compared to 9.4% in the first half of 2013. The first half 2014 effective tax rate increased as compared to first half of 2013 due to the expiration of certain Taiwan tax holidays, the expiration of the Federal Research & Development Tax Credit on December 31, 2013 and reduced reserve releases partially offset by favorable income mix across tax jurisdictions. Release of uncertain tax position reserves due to expiration of certain statutes of limitations or completion of tax audits reduced our expense by $10,985 and $26,493, respectively, in the first half of 2014 and the first half of 2013. Also, contributing to the lower rate in the first half of 2013 is the impact of $6,301 of research and development tax credits related to 2012 which were recognized when the related legislation was enacted in January 2013.