South Korea's exports of information and communication technology (ICT) products were estimated at US$17.06 billion in April, rising 32.6 percent from a year earlier.
It was the sharpest rise since April 2010 and marked the 11th consecutive month of on-year gains.
Last month's imports also increased, reaching $10.78 billion for a 21.5 percent on-year hike.
Semiconductor exports soared 29.4 percent on-year to $9.4 billion, while those of memory chips jumped 18.8 percent to $5.93 billion, and logic chips surged 59 percent to $2.94 billion.
Display shipments advanced 35.1 percent to $1.67 billion due to robust demand for organic light-emitting diodes (OLED) in smartphones.
Exports of OLED accounted for a 57.5 percent gain to $840 million, while liquid crystal display (LCD) hiked 13.1 percent to $500 million.
Shipments of mobile phones and related parts advanced 89.7 percent on year to $1.24 billion, with those going to the EU spiking 374.6 percent and those to China increasing 145 percent.
Overall, exports to China rose 21.6 percent on-year to $8.04 billion, due to demand for displays, mobile phones, and chips.
Exports to Vietnam gained 67 percent to $2.39 billion, while those to the US jumped 25.2 percent to $2.13 billion on the back of demand for rechargeable batteries and mobile phones.
South Korea's total exports in April surged 41.1 percent on year to $51.19 billion due to upbeat shipments of chips and autos.